Starting a 30-day habit

Pick one habit that takes under ten minutes. A walk after lunch, a glass of water with each meal, planning Sunday dinner. Small is the point.

Put the card where you will see it

The fridge door works. A card that lives in a drawer gets forgotten by day four.

If you miss a day

Cross out nothing and start again the next morning. The grid has thirty boxes so that you can miss a few and still finish.