You used to devour a big bag of potato chips with your lunch, but when you decided to lose weight, you replaced it with a side salad. Now that the weight is off, don't go back to your chips habit. Losing weight is a lifestyle change, not something you do until you reach your goal. Once you go back to old eating habits, the weight will quickly creep back on. Give yourself room for indulgences, but make sure it's all in moderation.