Im making a commercial. any tips?

ok so I have this eco project to make a product and to create a commercial on it. Im thinking of making a ‘magic diet pill’. so i need a good commercial. and i wanna try to add a lot of humor in it as well, cuz well thats just how I am =D
so yea any ideas?
yea i already thought of adding a ton of before and after pics and showing ‘testimonials’ but I need humor!