There are hundreds if not thousands of diet plans out there. Some are very popular. Some are very quirky. No matter what type of diet plan you may choose, there are several important factors that will determine whether you will lose weight and achieve your dietary goals. Most people who start a diet plan will lose some weight in the beginning and then level off and not lose any more weight. The reason is that they either do not follow the plan as it was designed or they cheat and add foods that are not supposed to be on the diet. If you have the willpower and closely follow most diets, you will be able to lose weight and get closer to your dietary goal.