About SpanPost
Habit experiments on one human. Numbers. Charts. No woo.
SpanPost is a one-person field journal on productivity, focus, sleep, and the boring mechanics of getting useful things done. Each post documents an experiment — usually on the author — with hypothesis, method, data, and what changed.
About the author — Daniel Park
Daniel Park is a software engineer based in Toronto. He's been running structured habit and focus experiments on himself for about four years — tracking sleep, caffeine, deep-work blocks, exercise, and a dozen other variables with whatever wearable, app, or spreadsheet happens to do the job. SpanPost is where he publishes the weekly logs and the occasional longer essay when a pattern actually shows up in the data.
He is not a doctor, nutritionist, or coach. He's an engineer who likes datasets where n=1. Find him on X as @dpark_logs.
What this site covers
- Weekly habit-experiment logs — hypothesis, method, data, result, next iteration
- Productivity systems for people who code or write for a living
- Focus, deep-work, and energy management
- Sleep, caffeine, and other inputs we like to pretend we control
- Tool reviews — apps, wearables, and methods, judged by whether they survive contact with real life
How this site is written
Every article on SpanPostis AI-assisted and human-edited. The data comes from Daniel's own tracking. The judgments are his own. Anything that can't be checked against the logs gets hedged or removed. See our full Editorial Policy and AI Disclosure.
Got a habit experiment you've been running? Tool you want reviewed? Correction? Get in touch.