Cronus Blog
Insights on productivity, time management, and building better focus habits.
Product•2026-08-28•8 min read
Strava for Your Work Life Is the Wrong Metaphor. Eight Sleep Is the Right One.
Everyone reaches for Strava when they describe a tracker for knowledge work. The analogy breaks in exactly the place that matters: Strava measures something you chose to do and want credit for. Your work day is something that happened to you and that you cannot self-report. That is a sleep tracker, not a running app.
Productivity•2026-08-11•9 min read
We Read the 97 Most-Upvoted ADHD Posts About Time. Nobody Was Asking How to Be More Productive.
Original research: 97 posts, 80,561 upvotes, 11,891 comments across r/ADHD and r/adhdwomen. The dominant theme is not productivity. It is being disbelieved.
Productivity•2026-08-11•9 min read
We Ran the Same Study on r/ADHD and r/productivity. One Number Was Identical.
Original research comparing 144 top posts across both communities. Task initiation is the same problem in both. Everything downstream of it is not.
Productivity•2026-08-10•7 min read
Why Am I Always Late? (Even When I Leave Early)
Leaving earlier does not fix chronic lateness, and there is a specific reason why. What is actually going wrong, and what works instead of trying harder.
Productivity•2026-08-10•8 min read
Time Blocking: Why It Fails, and the Step Everyone Skips
Time blocking works. Most people quit in two weeks. The reason is that they block time against a guess about their own capacity, and the guess is wrong.
Product•2026-08-10•8 min read
The Best MacBook Notch Apps in 2026 (Boring Notch, MewNotch and More)
Apple gave the MacBook a notch and no way to use it. A handful of open-source apps turned it into a Dynamic Island. Here is what each one does, and which to install.
Productivity•2026-08-10•8 min read
How to Stop Doomscrolling (When Blocking Apps Have Not Worked)
You have tried the blockers, the app timers and the grayscale screen. Here is why those fail, what doomscrolling is actually doing for you, and what works instead.
Productivity•2026-08-10•8 min read
ADHD Symptoms in Women: Why They Get Missed
Men are diagnosed with ADHD far more often than women, and it is not because fewer women have it. What the symptoms look like, and why the criteria miss them.
Productivity•2026-08-10•7 min read
Rejection Sensitive Dysphoria: What It Is, and What the Evidence Actually Says
RSD describes something real. It is also not a formal diagnosis, and the famous prevalence numbers are weaker than they look. Here is the honest version.
Productivity•2026-08-10•9 min read
ADHD Paralysis: Why You Freeze, and What Actually Gets You Moving
Sitting on the sofa knowing exactly what you should be doing and being unable to start it. What ADHD paralysis is, the three forms it takes, and why "just start" is useless advice.
Productivity•2026-08-10•9 min read
ADHD Hyperfocus: Why It Is Not a Superpower, and How to Aim It
Hyperfocus is not the opposite of distraction. It is the same attention dysregulation pointed inward, which is why you cannot summon it and cannot stop it. What it costs, and how to influence where it lands.
Productivity•2026-08-10•9 min read
ADHD Executive Dysfunction: What It Is, in Plain Language
Executive dysfunction is why you can know exactly what to do and still not do it. The seven functions involved, which ones ADHD affects most, and what helps for each.
Productivity•2026-08-10•9 min read
ADHD Burnout: Why It Is Not the Same as Regular Burnout
The collapse after months of holding it together. What makes ADHD burnout different, the cycle that produces it, and the warning signs that show up in your calendar before you feel them.
Productivity•2026-08-09•8 min read
Developers Thought AI Made Them 20% Faster. It Made Them 19% Slower.
The most important productivity finding of the last two years is not about AI. It is about how badly we estimate our own time, and what it takes to find out the truth.
Productivity•2026-08-09•7 min read
Where Did My Day Go? How to Actually Find Out
You worked all day and cannot say what you did. Here are the four places the hours actually went, and how to get a real answer instead of a guess.
Productivity•2026-08-09•4 min read
What We Learned about time tracking from Elon Musk and 5 successful CEOs
A list of the best time-tracking resources for founders, PMs, and engineers.
Productivity•2026-08-09•7 min read
How Do You Track Time When Three Agents Are Running at Once?
Every time tracker ever built assumes one person doing one thing. In 2026 that assumption quietly broke, and nobody has fixed it yet. Including us.
Productivity•2026-08-09•8 min read
ADHD Time Blindness: Why You Lose Hours, and How to Get Them Back
Sitting down at 9am and looking up at 2pm is not a character flaw. What time blindness actually is, why it is more pronounced with ADHD, why willpower does not fix it, and what does.
Productivity•2026-08-09•4 min read
Is Half Your Life Over by 18? Why Time Speeds Up as You Age
By one well-known model you have lived half your perceived life by about 18. Here is where that figure comes from, why it is not as bleak as it sounds, and what actually slows time back down.
Product•2026-08-09•7 min read
How Cronus Works: The Complete Guide to AI-Powered Productivity Tracking
Discover how Cronus uses AI to automatically track your activities, understand your goals, and help you stay focused without manual timers or rigid blocking rules.
Productivity•2026-08-09•4 min read
Benjamin Franklin on Time Tracking
A brief history of time tracking and how it has evolved over the years.
Productivity•2026-08-09•9 min read
ADHD and Time Tracking: Why Manual Trackers Fail You Specifically
Every popular time tracking method asks you to notice time, remember, and interrupt yourself. If those are the hard parts, the method is the problem, not you.
Product•2026-08-09•11 min read
11 Best AI Time Tracking Tools in 2026
An honest comparison of the AI time tracking tools worth knowing in 2026, with current pricing: Cronus, Rize, RescueTime, Timing, Timely, Memtime, Early, ManicTime, ActivityWatch, Toggl and Motion.
Product•2026-08-08•9 min read
Coast App Review: Is Recording Your Screen Every 2 Seconds Actually Useful?
Coast records everything you see, locally, and lets your AI agent search it. We installed it. Here is what it is genuinely good at, where the pitch breaks down, and why recall is a different problem from knowing where your time went.
Product•2026-08-08•8 min read
Best Rize.io Alternatives in 2026, Including the Free Ones
Rize now runs four paid tiers metered by AI credits, from $12.99 to $49.99 a month. Every alternative worth switching to, priced side by side, including the free and open-source one, and what you give up to pay nothing.
Productivity•2026-08-12•6 min read
Work Log Template: Three Formats, and When Each One Stops Working
Copy-paste templates for a daily work log, a project log and a billable log, plus the honest account of why most people abandon them in week three.
Productivity•2026-08-12•8 min read
Weekly Planning: A 30-Minute System That Survives a Bad Week
Most weekly plans fail by Tuesday because they are built from optimistic estimates and assume a week with no interruptions. Here is the version that holds.
Productivity•2026-08-12•7 min read
Time Theft: What It Actually Is, and Why Most of the Panic Is Misplaced
Vendors sell surveillance to solve it. The legal definition is narrow, the real cost is usually elsewhere, and monitoring reliably produces the behaviour it was meant to prevent.
Productivity•2026-08-12•5 min read
The Shutdown Ritual: Five Minutes That End the Working Day
Work follows you home because your brain keeps unfinished tasks active. A short closing routine releases them, and there is a reasonable mechanism for why.
Productivity•2026-08-12•7 min read
The Types of Procrastination, and Why the Category Matters
Procrastination is not one behaviour. Six things get called by the same name, they have different causes, and the advice for one makes another worse.
Productivity•2026-08-12•6 min read
Output vs Outcome: Why Measuring Work Keeps Going Wrong
Output is what you produced. Outcome is what changed because of it. Almost every productivity metric measures the first and claims to measure the second.
ADHD•2026-08-12•8 min read
Neurodivergent Burnout: Why It Is Not the Same as Work Burnout
Occupational burnout comes from too much work. Autistic and ADHD burnout comes from sustained masking and compensation, which is why a holiday does not fix it.
Productivity•2026-08-12•7 min read
The Multitasking Myth: What the Research Actually Found
You are not doing two things at once, you are switching between them and paying a toll each time. What the evidence supports, what gets overstated, and the one number worth measuring.
Productivity•2026-08-12•6 min read
Motivation vs Discipline: Both Are the Wrong Thing to Rely On
The internet says motivation is unreliable and discipline is the answer. Discipline is also a finite resource, and the people who appear to have it mostly built systems instead.
Productivity•2026-08-12•7 min read
How to Slow Down Time: What Actually Works, According to the Research
Time feels faster every year because your brain stores fewer distinct memories. That mechanism is well understood, and it tells you exactly what to do about it.
Productivity•2026-08-12•6 min read
How Many Working Days Are in a Year? (2026 and 2027, Month by Month)
2026 has 261 weekdays and 250 working days after federal holidays. Full month-by-month tables for 2026 and 2027, plus what the number is actually good for.
Productivity•2026-08-12•7 min read
How Many Work Hours Are in a Year? (2026 and 2027)
2,080 is the payroll answer. 2026 actually contains 250 working days and 2,000 hours after federal holidays, and the number you actually work is different again.
Productivity•2026-08-12•6 min read
Busywork: How to Tell It From Real Work, and How to Cut It
Busywork feels productive, which is exactly the problem. Four tests that separate it from work that matters, and what to do when it is imposed on you.
ADHD•2026-08-12•8 min read
Best Jobs for ADHD: What Actually Matters Is Not the Job Title
Lists of "ADHD-friendly careers" are mostly guesswork. The job features that predict whether you thrive are more useful than the job names, and they cut across every industry.
ADHD•2026-08-12•7 min read
Autistic Shutdown: What Is Happening, and What Helps
The system goes quiet rather than loud. Speech stops, the body stops, and nothing gets through. What separates it from a meltdown, from dissociation and from ordinary tiredness.
ADHD•2026-08-12•8 min read
Autistic Masking: The Work Nobody Sees, and What It Costs
Suppressing autistic traits to pass as neurotypical is unpaid labour running all day. Here is what it is made of, why it correlates with burnout and worse mental health, and what unmasking realistically looks like.
ADHD•2026-08-12•6 min read
ADHD Waiting Mode: Why One Appointment Eats the Whole Day
You have a call at 3pm. It is 10am and you have done nothing, and you will do nothing until it happens. Here is the mechanism, and the four things that actually shorten it.
ADHD•2026-08-12•7 min read
The ADHD Tax: What It Costs and How to Stop Paying It
Late fees, forgotten subscriptions, replacing things you own, food that rotted. It is not carelessness, it is a predictable surcharge, and most of it can be engineered away.
ADHD•2026-08-12•6 min read
ADHD Shutdown: When the System Stops Rather Than Speeds Up
Not everyone with ADHD gets restless under pressure. Some go blank, stop functioning, and cannot explain why. What is happening and what brings you back.
ADHD•2026-08-12•7 min read
ADHD Routines: Why You Cannot Build One, and What to Do Instead
Routines rely on habit formation, and the ADHD brain runs on interest rather than repetition. Here is the version that actually survives.
ADHD•2026-08-12•7 min read
ADHD and Reading: Why the Words Stop Going In
Reading the same paragraph four times, or finishing a page having absorbed nothing. What is actually happening, and the formats that work around it.
ADHD•2026-08-12•8 min read
ADHD Planners: Which Ones Work, and Why Most Get Abandoned by Week Three
Paper or digital, undated or dated, and the design features that actually matter. We do not sell a planner, so this is just the honest version.
ADHD•2026-08-12•7 min read
ADHD and Object Permanence: Why Out of Sight Really Is Out of Mind
Tasks, people and time stop existing the moment they leave view. The term is borrowed and technically wrong, but it describes something real.
ADHD•2026-08-12•7 min read
ADHD and Gaming: Why Games Work When Nothing Else Does
Games deliver exactly what an ADHD brain cannot generate for itself. That is why they are so absorbing, and why six hours vanish without a trace.
ADHD•2026-08-12•7 min read
ADHD Focus Music: What the Evidence Says, and What Actually Works
Binaural beats, brown noise, lo-fi and video game soundtracks. The research is thinner than the marketing, but a few findings hold up.
ADHD•2026-08-12•8 min read
ADHD and Emotional Dysregulation: The Symptom That Is Not in the Criteria
Emotions arrive faster, hit harder and take longer to come down. It is one of the most disabling parts of ADHD and it is missing from the diagnostic manual.
ADHD•2026-08-12•6 min read
ADHD and Decision Fatigue: Why Small Choices Cost So Much
Choosing what to eat should not be exhausting. With ADHD the deciding itself is expensive, and it runs out long before the day does.
ADHD•2026-08-12•7 min read
ADHD and Cleaning: Doom Piles, and Why the Mess Is Not About Cleaning
The dishes are not undone because you are lazy. They are undone because "clean the kitchen" is not a task, it is about forty of them, and none has an obvious first step.
ADHD•2026-08-12•6 min read
ADHD and Caffeine: Why It Sometimes Calms You Down
Caffeine is a stimulant that some people with ADHD find sedating. The mechanism is real, the effect is much weaker than medication, and the sleep cost usually outweighs it.
ADHD•2026-08-12•9 min read
The Best Apps for ADHD Adults in 2026 (From People Who Make One)
What actually survives past week two, what each app costs, and the honest reason most ADHD apps get abandoned. We make one of these, and we say where it is the wrong choice.
Productivity•2026-08-11•6 min read
Too Many Meetings: The Cost Is Not the Hours
A calendar showing 12 hours of meetings is not costing you 12 hours. It is costing you most of the week, and the difference is why "we only have 12 hours of meetings" sounds reasonable.
Product•2026-08-11•6 min read
Time Tracking for Lawyers: What to Use, and Why We Are Not It
Billable hour capture has requirements most trackers do not meet, and ours meets none of them. What actually works, and the one thing worth measuring alongside it.
Product•2026-08-11•6 min read
Time Tracking for Freelancers: Your Real Hourly Rate Is Lower Than You Think
The billable hours are the easy part. The unpaid ones decide whether freelancing works, and no invoicing tool will ever show them to you.
Product•2026-08-11•5 min read
Time Tracking for Designers: Revisions Are Where the Money Goes
Design estimates fail on revisions, not on the first draft. What to use, and why creative work is the hardest thing to track by hand.
Product•2026-08-11•7 min read
Time Tracking for Consultants: What to Use, From Someone Who Does Not Sell You Billing
If your hours become an invoice, we are the wrong tool. Here is what to use instead, what each one costs, and the one case where we are still worth having.
Product•2026-08-11•6 min read
Time Tracking for Accountants: Billing, Busy Season, and the Hours That Never Reach a Bill
What to use for WIP and billing, and the separate problem of where the other half of the year goes. Written by people who do not sell you a billing system.
Productivity•2026-08-11•8 min read
Time Anxiety: The Dread That You Are Wasting Your Life, and What Actually Helps
The background feeling that you are behind, running out, and spending your days on the wrong things. Where it comes from, why productivity systems make it worse, and the one thing that reliably reduces it.
Productivity•2026-08-11•7 min read
Return to Office: What the Argument Is Actually About
Both sides quote productivity research and neither has the data. What the evidence supports, what it does not, and the measurement that would settle it.
Product•2026-08-11•6 min read
Real Estate Agent Time Management: Drive Time Is the Hidden Cost
Showings and commuting eat the day, and desk trackers cannot see any of it. What to use for drive time and mileage, and what to use for the rest.
Productivity•2026-08-11•6 min read
Productivity Guilt: Why a Good Day Still Feels Like a Failure
You worked all day and went to bed feeling like you got nothing done. That gap is not a motivation problem, and there is a specific reason it happens.
ADHD•2026-08-11•9 min read
Monotropism: The Autistic Theory of Attention That Explains Almost Everything
One deep channel of attention instead of several shallow ones. An autistic-authored theory that explains transitions, routines, interests, overwhelm and time loss with a single idea.
Productivity•2026-08-11•7 min read
Monk Mode: What It Actually Is, and the Version That Survives Contact With a Job
Strip everything out and work. It works, briefly, and most people crash. Here is the honest version, including how to tell whether it did anything.
Product•2026-08-11•9 min read
Every App on My Mac, and Which Ones I Actually Open
Not a list of forty apps. The real contents of a working developer Mac, including the three time trackers installed at once and what that says about the category.
ADHD•2026-08-11•9 min read
Hyperfixation: What It Is, How It Differs From Hyperfocus, and What It Costs
Total absorption in one subject, for hours or months, while everything else stops existing. What separates it from hyperfocus, special interests and OCD obsessions, and why the time it takes is invisible from the inside.
Productivity•2026-08-11•6 min read
The Flowtime Technique: Pomodoro Without the Timer Interrupting You
Work until you naturally stop, then record what you did and how long it took. It fixes the one thing Pomodoro gets wrong, and it doubles as a time audit.
ADHD•2026-08-11•8 min read
The Dopamine Menu: How to Build One, and the Failure Mode Nobody Warns You About
A list of things that reliably feel good, sorted like a restaurant menu, so you stop reaching for your phone by default. Here is how to build one and why most of them quietly collapse into dessert.
Productivity•2026-08-11•8 min read
Developer Productivity: What the Evidence Says, Including the Uncomfortable Part
PRs per week stopped meaning anything, DORA and SPACE measure teams not people, and developers misjudge their own speed by forty percentage points. What is left.
Productivity•2026-08-11•6 min read
Commute Time: What It Really Costs, and How to Get Some of It Back
The average US commute is about 27 minutes each way. The cost is not the 27 minutes, and the research on what commuting does to wellbeing is unusually consistent.
Product•2026-08-11•6 min read
Agency Time Tracking: Utilisation, Scope Creep, and What the Timesheet Hides
What to use for agency billing and utilisation, why timesheets systematically understate scope creep, and the one thing we are useful for. We do not build team dashboards.
Productivity•2026-08-10•6 min read
Time Tracking Spreadsheet: A Template, and When to Stop Using It
A spreadsheet is the right tool for billing and the wrong tool for finding out where your week goes. Here is a template that works, and the point at which it stops.
Productivity•2026-08-10•7 min read
How to Do a Time Audit (Without Giving Up on Day Three)
A time audit tells you where your week actually goes. Most people abandon it before the data is useful. Here is the method, and how to avoid the three ways it fails.
Product•2026-08-10•7 min read
Mac Window Management in 2026: Rectangle, Raycast, and What macOS Now Does Itself
macOS gained real window tiling, which changed what you need. What the built-in version covers, when a third-party tool still earns its place, and which one.
Productivity•2026-08-10•6 min read
Autistic Inertia: Why Starting and Stopping Are Both Hard
Autistic inertia is not laziness or procrastination. It is difficulty changing state in either direction, and that distinction changes what helps.
Productivity•2026-08-10•7 min read
Analysis Paralysis: Why More Information Makes Decisions Harder
Past a certain point, extra research stops improving the decision and starts preventing it. What causes it, and five ways out that take minutes.
Productivity•2026-08-10•7 min read
ADHD and Sleep: Why You Cannot Go to Bed, and Why Mornings Are Worse
Delayed sleep, revenge bedtime procrastination, and the morning that never gets easier. What is actually going on, and the interventions that help.
Productivity•2026-08-10•7 min read
ADHD and Relationships: The Problems Are Rarely What They Look Like
Lateness reads as not caring. Forgetting reads as not listening. Both readings are wrong, and both are reasonable from the outside. What actually helps.
Productivity•2026-08-10•7 min read
ADHD Procrastination: Why Deadlines Work and Nothing Else Does
You can produce excellent work at 2am the night before. You cannot produce anything three weeks out. That is not a character flaw, and it points at what actually helps.
Productivity•2026-08-10•6 min read
ADHD Forgetfulness: It Is Usually Working Memory, Not Memory
You remember a film from 2009 but not why you walked into the kitchen. Those use different systems, and only one of them is the problem.
Productivity•2026-08-10•9 min read
ADHD Accommodations at Work: What to Ask For, and How to Ask
Most accommodation lists are written for HR. This one is written for the person who has to ask. What actually helps, what to say, and why evidence about your own patterns makes the conversation easier.
Productivity•2026-08-10•6 min read
Accountability Partners and Body Doubling: Why They Work Better Than Apps
Another person in the room outperforms every productivity tool, including ours. Here is why, the difference between the two approaches, and how to set one up.
Productivity•2026-08-09•6 min read
Why a Week of Travel Feels Longer Than a Month at Your Desk
Two weeks abroad feels like a month in memory. Two months of routine feels like a weekend. The mechanism is well understood, and it is not really about travel.
Productivity•2026-08-09•6 min read
Why Childhood Summers Felt Infinite
A summer at nine lasted forever. A summer at thirty-five is a long weekend. Four things were different, and three of them you can still influence.
Productivity•2026-08-09•6 min read
AI Gave You Back Six Hours a Week. Where Did They Go?
Reports of hours recovered from AI are everywhere. Reports of what happened to those hours are nowhere, and that absence is the whole story.
Product•2026-08-09•4 min read
Welcome to Cronus: Redefining Productivity Tracking
Discover how Cronus is revolutionizing the way we understand and improve our focus through intelligent, goal-aware tracking.
Product•2026-08-09•6 min read
Toggl Alternatives for People Who Forget to Start the Timer
Toggl is the best manual time tracker there is. That is the problem. Here is what to use if the timer is the part that keeps failing.
Productivity•2026-08-09•7 min read
Seven Time Perception Experiments You Can Run on Yourself
Your sense of how long things take is measurably wrong. Here are seven experiments that show you exactly how wrong, most of which take under a week.
Productivity•2026-08-09•8 min read
What Is Quantified Self? The Complete Guide to Productivity Tracking
Discover how self-tracking and data-driven insights can transform your productivity, focus, and time management through the Quantified Self movement.
Productivity•2026-08-09•6 min read
The Power of Gentle Nudges: How Small Reminders Can Transform Your Productivity
Discover why gentle nudges are more effective than strict blockers, and how Cronus uses behavioral science to help you stay focused and achieve your goals.
Productivity•2026-08-09•8 min read
Is Time Still the Right Unit of Work?
Lines of code broke. Pull requests broke. Story points were always broken. So teams turned to DORA, SPACE and DX Core 4, and hours quietly survived every one of these transitions. Here is why.
Productivity•2026-08-09•5 min read
How to Beat Distractions at Work: Smarter Focus with Context-Aware Tools
Learn how to reclaim your attention and improve focus using AI-powered context-aware tools that understand your work patterns instead of rigid blocking approaches.
Product•2026-08-09•7 min read
Free Time Tracking Apps With No Subscription (2026)
Which trackers are genuinely free, which are free tiers designed to run out, and what the free ones cannot do. Written by a company that charges $6 a month.
Product•2026-08-09•8 min read
Free and Open-Source Time Trackers in 2026 (And When They Are Not Enough)
ActivityWatch, Super Productivity, Timewarrior and friends: what you get for nothing, what the real cost is, and the one thing none of them do.
Product•2026-08-09•7 min read
Cronus vs Timing: Which Mac Time Tracker Should You Use in 2026?
Timing is the best-established automatic tracker on the Mac. It also asks you to describe your work as keyword rules. Here is the honest comparison.
Product•2026-08-09•6 min read
Cronus vs Timely: Which Should You Use in 2026?
Timely drafts timesheets you approve. Cronus just tells you where your time went. One of those is a billing tool and one is not, and picking wrong is why people are unhappy with both.
Product•2026-08-09•6 min read
Cronus vs Rize: Which AI Time Tracker Should You Use in 2026?
A head-to-head on categorization, pricing, privacy and complexity. Rize is the bigger product. That is the problem and, for some people, the point.
Product•2026-08-09•6 min read
Cronus vs RescueTime: Which Should You Use in 2026?
RescueTime has eighteen years of history and a dashboard that rarely tells you what to change. Cronus has neither the history nor the dashboard. Here is the honest comparison.
Product•2026-08-09•7 min read
Best Timing App Alternatives in 2026
Timing is a very good Mac tracker with one structural cost: you describe your work as keyword rules and maintain them forever. Here is where to go if that is the part you want gone.
Product•2026-08-09•7 min read
Best Timely Alternatives in 2026
Timely is excellent if you bill clients and frustrating if you do not. Here are the best alternatives in 2026, depending on which of those two people you are.
Product•2026-08-09•8 min read
Best RescueTime Alternatives, Free and Paid in 2026
RescueTime still collects good data and still struggles to tell you what to do with it. Here are the best alternatives in 2026, ranked by what you actually need.
Product•2026-08-09•9 min read
The Best Automatic Time Tracking Apps for Mac in 2026
Every Mac time tracker that runs without you starting a timer, what each one costs, what it does with macOS permissions, and which to pick.
Productivity•2026-08-09•8 min read
Screenshots, Window Titles, or On-Device: AI Time Tracking Privacy in 2026
Every tracker now markets itself as private. They mean completely different things by it. Here is how to tell what a tool actually sees, and which trade you are making.
Productivity•2026-08-09•8 min read
Time in 15-Minute Increments: Conversion Chart and How to Use Them
What 15-minute increments mean, the decimal conversion chart for timesheets (15 min = 0.25), the rounding rules, and how to plan a day in quarter-hour blocks.