Check out our earlier blog post, “Sites for artists and photographers trying to sell and protect their images.”
Also, see “Top 10 Ways to Make Money Selling Your Photos.”
Finally, one worthwhile option is licensing your work through Creative Commons. Creative Commons is a tool that lets you share your creativity and innovation in such a way that the whole world can see and/or hear your work, you retain copyright ownership, and you can modify the copyright items in such a way that best suits your needs. However, you don’t get paid. Click here for more information.