make money with domains

Hi all, I have close to 100 unused domains and I want to know what is the best way to monetize them without setting up 100 websites and using adsense. I am registered with Godaddy's domain parking program and as far as I can tell is a non-functioning program. According to Godaddy domain...

Basically I have two domains .. one is an ecommerce gadget store and the other is a weight loss site. I have failed to earn any money off either of the sites but I really don't want to give up on them. What ways can I get money out of them? I was thinking of just integrating an amazon affiliate...