Design one habit so it actually sticks — small enough to be unmissable, anchored to something you already do, with a plan for the days you slip. Use when asked to build a habit, help me stick to [habit], I keep failing at [routine], or start a new habit. Produces a shrunk-down version of the habit, a concrete cue/anchor and time/place, a tracking method, a friction plan (make good easy, bad hard), and a get-back-on-track rule so one miss doesn't end it.