No one is perfect. So you ate the whole piece of cheesecake? So what! One large meal, one dessert, one bag of chips did not make you overweight. It was one large meal after another, too many desserts, and far too many bags of chips. When you are trying to lose weight, you either stick to your diet strictly or you blow it by overindulging. This all-or-nothing approach never works. Everybody who is trying to change will backslide every now and then. Don’t waste time being guilty, just re-institute thin habits and get going in the right direction again.