One way to earn money with your blog / website is to sell links on your website. You can do it the normal way, by adding the links manually and people have to contact you personally to buy links. Or you can do something a little more exciting. With phpLinkBid you can have a link auction and sell the best spots to the highest bidders.
The software looks really cool and it seems to be easy to use. Visit phpLinkBid and see for yourself.