Find your food confidence.
A nutritionist once shared this little golden nugget of advice: When you make good decisions, you teach yourself that you can be trusted to make good decisions, but when you tell yourself that you're going to make a good decision and do the opposite, you're effectively letting yourself down. This negatively impacts your self-confidence, and you literally trust yourself less. So when you say you're not going to have ice cream for the third night in a row at the dining hall, don't do it. As you begin to trust yourself more, you'll become more confident in your own ability to make healthy choices—which eventually makes skipping that sundae a little easier.