affiliate marketing. if you get just the right thing to sell then you can make plenty off of it. its hard work though you have to promote it very well theres also programs you can buy that help you with the promoting part they give you the keywords and ads to put inta a pay per click program this is what i use http://forums.xisto.com/no_longer_exists/ it gives me the ads and keywords and all i do is put them into action it works very well