Blog.
Notes on Mac time tracking, closed-lid LLM workflows, and reading your own data. Field reports from building Timex.
Cognitive Fatigue at Work: A Log That Doesn't Diagnose You
Cognitive fatigue at work is mental tiredness you describe yourself. Here's a plain three-to-five-day task log, a worked example, and its limits.
Parkinson's Law: Set a Stopping Rule, Not an Impossible Deadline
Parkinson's law says work expands to fill the time available. Here's a worksheet for testing a bounded stopping rule on low-stakes work while holding scope and quality constant.
Freelance Hourly Rate: Calculate Your Floor From Billable Hours
A freelance hourly rate floor comes from what you need to cover divided by the hours you can actually bill. Here's the worksheet, the math, and the limits.
Timex 1.7.0: the last update you install by hand
Timex now updates itself, so install 1.7.0 by hand one last time. This post also covers 1.6, which never got one: breaks that wait for calls, focus sessions, projects, and an Energy estimate that adapts to you.
Shutdown ritual: a 12-minute end-of-workday checklist
A shutdown ritual gives unfinished work a next step so you can leave it until tomorrow. Use this 12-minute end-of-day checklist, then a simple rule for work thoughts that return at night.
Study tracker: how to track study time and set a weekly target
Study tracker options, a simple log that makes study hours useful, and a realistic way to decide how many hours a day to study.
Ultradian rhythm: does the 90 minute rule apply to work?
Ultradian rhythm is real biology — sleep cycles and hormone pulses. What the evidence says about the 90-minute work rule, and how to find your own interval.
Website time tracker: 4 ways to see your time per site, and what each one can read
A website time tracker can be Screen Time, a Chrome extension, or a desktop app. What each records, which browsers it covers, where your history lives, what it's allowed to read, and a 10-minute setup.
Rize app review (2026): price, privacy, and who it's for
A Rize app review from a competitor's founder: what the rize.io AI time tracker does now, prices checked October 2026, where your data goes, and who should pick it.
How to enter flow state on your Mac: a setup you can repeat
How to enter flow state: set one clear target, tune the challenge, silence Mac notifications, and check afterwards whether the session felt like flow.