When on a diet, after being "good" all week, try non-food ways to treat yourself (like catching a movie) instead of using food as a treat.

When you are on a diet, it's important to pay attention to exactly what you're eating and the quantity you're eating on weekends. If you are not careful, even a few treats can easily provide you more calories than you have saved during the week. Some good ways to treat yourself include getting a massage at a spa and meeting a friend for a walk.