I've fallen off the wagon

when I eat something I know to be off limits, or dangerous I feel a rush of misbehaviour and foolishly think that one bite will be all I need to get a rush then I won't need anymore, so I open the door to the cupboard and take a peek at what I can eat.

1. I should ask myself if I am actually hungry
2. I should keep fruit in the cupboard so I can choose that
3. I should keep a note asking politely to choose a yogurt

I need to be able to shut the door without grabbing anything and stay on plan.