Only one thing works in life and that is hard-work! But it's not anywhere near as hard as you think. It's a case of seeing through hype and forcing yourself to accept reality as it is and to then go forward with a positive attitude and make an effort.
A simple diet and a bit of exercise can net you unbelievable results! Most people tend to quit when they don't see results right away but it takes time for results to happen as nothing is immediate. This is where willpower is required, to help you stay on track. If you can stay focused on your goal to lose weight and get in shape, you will succeed.