I redirect my interests. Do you want to overeat or buy stuff you don't use that uses up money you don't have? I'm thinking not.

Decide to study nutrition. Find a site that lets you play with nutritional needs and calories (like: NutritionData.com ) and give yourself a "budget" (say, 2000 calories) and see if you can get your 5+ fruits and vegetables, 25-35 grams of fiber, 60 protein, keep your potassium/magnesium/calcium ratios as close to optimal as possible (Ten important things to know about magnesium).

Studying nutrition helped me with both eating and the challenge of lowering calories versus how much to exercise, what to "spend" my calories on, etc. made it less likely that I would buy stuff. I converted my money wants into calories?

Or, another think I use to like to do is decide what I would do with $10,000,000? LOL Often I would start a non-profit organization and thinking about how I would spend money if I had it, what I would do specifically, etc. got me thinking about what I truly value/want and I'd come up with ways to get some of that on a smaller scale. I've collected all the change from my husband's and my spending for a month and come up with enough to pay for a delivery pizza :-) or I've collected the change for a year and cashed it in at a Coinstar kiosk/machine (in lots of grocery stores), getting to keep it all as an Amazon certificate which I then gave as a gift for Christmas? Start a little TreasuryDirect account and buy savings bonds or open a savings account to help save some money for future projects (and think of the future project -- school, therapy, vacation, etc.).

When you are tempted, you remind yourself of what matters more to you. Instead of it being a yes/no, "switch" (should I eat or not, spend this money or not) which is hard not to flick it becomes a real choice and that's much more fun/pleasurable and rewarding to work with.