I suggest you try network marketing. Don't sign up for one that makes you pay to join though. Use the weight loss products offered and refer them to friends who want to lose weight as well. When they see your success, they will buy the products and perhaps even become distributors under you, making you even more money.
I've listed a good company below that has several weight loss products, many of which have ingredients featured in USA Weekend's article "5 Fat Fighters that Really Work".
I think only celebrities can get high paying commercials when they lose weight...Jarod with Subway was a gimmick so don't plan on that.