Tip # 1
Realize that a solution exists. There is nothing preventing you from gaining mass amounts of lean muscle. Although some people think that obesity is a sickness, it is just a problem like any other. It has a solution.
Tip # 2
Attack the problem from multiple angles. All legitimate cures are based on a mix of diet and exercise. Just like putting together pieces of a puzzle, you need to make sure that all the right pieces fit together to cure your issue. How programs lead you to success is what makes them different.
Tip # 3
Follow every step of your program. Just as you get no benefit from seeing a therapist only once, you will get no benefit from following only one step of your program. So whatever program you choose, make sure you follow it completely. The best programs understand the problem of body building and will guide you through the steps.