Most self-improvement advice targets behavior. Do the habit, use the app, follow the routine. And most of it doesn't stick, because behavior isn't the root system — identity is.
Your brain executes behavior based on who it believes you are. If its internal file says "I'm someone who starts things and quits," it will quietly steer you toward quitting, because brains like being right about themselves.
Not a big one. A grain of sand. But they accumulate, and at some point the file flips from "person who tries" to "person who does" — and then the behavior starts happening automatically, no willpower required.
The practical implication: promise size doesn't matter nearly as much as promise keeping. A ten-minute walk you actually take beats a 5am routine you abandon by Thursday. Most people break identity by overpromising, not by underperforming.
Shrink the promise until it's almost embarrassing, and then never break it. You're not building a habit. You're building evidence about who you are.