Copy John is a free daily habits newsletter: one documented habit from history’s greats, every day, in about three minutes to read.

Each issue picks one person, one specific thing they actually did, and whether it survives contact with a normal life. No morning-routine worship, and no upsell.

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Why Napoleon did not really sleep four hours a night. How Churchill got two working days out of one. Why the Da Vinci sleep schedule has no source at all. What Hemingway did every time the writing was going well.

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