A zero day is a day where you do nothing toward the thing that matters to you. Not a bad day - a zero day. There's a difference, and it's the whole game.
The Non-Zero Day rule says: never let a day be a zero. That's it. That's the entire system. One push-up counts. One sentence counts. Opening the document and typing your own name counts, on the truly catastrophic days.
Why something so small works
Because the rule isn't really about the push-up. It's about the vote. Every non-zero day is a vote for the identity "I am someone who shows up." And identity, not willpower, is what's actually running your behavior when nobody's watching.
Zero days are expensive in a way that has nothing to do with lost output. One zero day quietly grants permission for the next one. Two becomes a pattern. A week becomes a story - see also: the stories you tell yourself - and now you're not someone who missed a few days, you're someone who "fell off." All of that grief, to save the thirty seconds one push-up would have cost.
Lower the bar. No, lower.
Most people fail at habits because their minimum is secretly ambitious. "Just 30 minutes of writing" is not a minimum; it's a goal wearing a minimum's clothes. A real minimum is something you can do on the day you have the flu, the day the car breaks down, the day everything falls apart. If your floor isn't almost laughable, it isn't a floor.
This is the engine inside the Momentum 60 Challenge: sixty days, no zeros, with the bar set so low you'd be embarrassed to miss it - and a streak that becomes, frankly, too annoying to break. People think the streak tracks their progress. It doesn't. It builds their identity, one ridiculous little vote at a time.
Today is either a non-zero day or it isn't. You get to pick. It takes one push-up to pick correctly.
One Forward Thing
A short monthly email. One idea, one song, one small brave action. No 47-email funnel, now or ever. It hasn't started yet. Leave your email and you'll be on it from issue one.