Healthy living principles don't require a "fad" diet - the latest book or DVD. Eating right, exercising regularly, and taking care of yourself is not Rocket Science. Applying some common sense and some discipline, anyone can be on the path to a much healthier self. Aerobic exercise along with strength training and a healthy diet will help you decrease your weight, improve your current health, and reduce your risk of such ailments as Diabetes, Heart Disease, and even Cancer. I recommend a low fat diet and going light on your intake of sodium and sugar. It really isn't Rocket Science.
Really, the most important thing is changing your habits and sustaining them. You won't get anywhere permanently if you don't sustain the change.