Most people have trouble staying on a diet.
If they were to follow these simple and common-sensical rules, a lot of unnecessary stress due to failed goals could be avoided. If no one sees you eat something, it has no calories. If you eat a candy bar while drinking a diet soda, the calories in the candy bar are canceled by the diet soda. When you eat with someone else, the calories don't count as long as you eat less than the other person. Cookie pieces contain no calories.