The snooze button is a tiny lie you tell yourself nine minutes at a time.

The cost is not the nine minutes. It is the small repeated experience of telling yourself something and then not doing it, which builds into a quiet sense that your own commitments are negotiable. That sense turns up later in much larger places, long after the morning is forgotten. Tiny broken promises are still promises.

Pick a wake time you would genuinely honor, even if it is later than the aspirational one, and then keep it exactly. Honoring an easy commitment builds more than missing an ambitious one, and the evidence you collect matters more than the hour.