Even if you already have a good grasp of the affiliate marketing business model, I highly recommend you check out this primer section in your free account. Check out the article, but more importantly, make sure you watch ever video at the bottom of that page. Those videos are filled with a wealth of information from very, very successful affiliate marketers.
Great tips! Since I just started blogging in January I am still really just getting my toes wet in affiliates. However, I did notice that pictures and real life demonstrations of the product really help. For instance, I have several food posts where I talk about my favorite cook books and show what I have cooked out of them, and then included amazon links, sure enough I sold a few cook books.