Amazon provides a Amazon Widget called Quick Linker. This widget can be used to easily add a affiliate link from your blog post back to a product on Amazon. For example here is one for WordPress for Dummies. If you already have a Amazon Affliate account it is just a matter of logging in and getting the script it generates for you. But where do you paste it? I couldn’t find anything that would tell me. I finally decide to paste it in the header.php file before the body tag. So far it seems to be working correctly. I did notice that when I edited a post with tags in it for the Quick Linker that the asin attribute was removed from the anchor tags. I don’t know why that is. I just put it back in and tried not to edit it again. If anyone knows of a better way to do this please let me know.