If you are new to Affiliate Marketing as I am, then you may want to view theses help centers to get you stated. I have used these centers personally and found them to be very helpful.
 http://www.clickbank.com/help/category/affiliate-help/affiliate-basics/
http://www.moreniche.com/tutorials/
http://www.highprofits.com/affiliate-forum/

These are the three I started out with and found them to be very helpful. Once you get your feet wet in Affiliate Marketing the possibilities are out there for the taking.