One of the key elements of physical well being is nutrition. As such an important aspect of life in general it is important to try and understand our relationship with food. Often, by the time someone comes to a Personal Trainer for advice, they have tried and tested many diets and are at a loss for what to do next. In this situation I think it is best to stop dieting. Diets don't work. By introducing positive new eating habits you can learn how to enjoy food, good wholesome food. Without the guilt.
Stop counting calories and berating yourself if you slip up. Simply focus on incorporating more activity into your daily life and fuel your body correctly. The rest will fall into place.
Our bodies respond best to consistency. If you consistently eat well and exercise regularly your body will respond. It may not be an exciting miracle diet or supplement, but it works. If the exciting miracle diets and supplements work then why are they so quickly superseded by new ones.