One Rule for Greater Productivity: Protect Uninterrupted Time
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Collected in Robin Shen’s Field Notes · Content type and attribution are shown above
English translation of the Chinese post originally published 2021-09-06. Translated 2026-10-28 with AI assistance. Historical figures and claims have not been updated or independently verified. 中文原文
Reading guide
Most productivity methods draw on management theory. The founders of 37signals approach the issue through brain science: attention is among the brain’s scarcest resources and has high switching costs. Interrupt writing to make a slide deck, and you need time to shift gears. That transition is attention switching. Their culture therefore includes “protectionism”: preserve long, uninterrupted working blocks against meetings, approvals, reports, and other interruptions. They compare time to money: exchange it all for one-unit coins and you buy only scattered trinkets; spend it as one sum and you can buy lasting value. People busy across many projects may achieve less than someone focused on one. An hour and sixty separate minutes are entirely different.
Key points
- Switching attention is particularly costly.
- “Protectionism”: keep small interruptions out of working blocks.
- One hour ≠ sixty separate minutes.

Full text — English translation
These articles are personal notes, book excerpts, and collected reprints. Figures and events reflect the time of the original publication, are not current information, and do not constitute investment advice.
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