Article · 10 min read

How and Why to Keep a Commonplace Book

Ryan Holiday · RyanHoliday.net Free Beginner

Before apps, serious thinkers kept a commonplace book, one running log of quotes, observations, and ideas they could mine later. Holiday's short piece is the simplest possible version of the capture habit, and it works on index cards or in a doc. Read it if a full system feels heavy and you just want to start logging what you notice this week.

  • Keep one running log of what you notice.
  • Tag entries by theme so patterns surface.
  • The value is in revisiting, not just collecting.
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The question it answers

  1. How do I build a habit or system for spotting trends instead of relying on random luck?

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