Thought I would take a moment to promote the Amazon Page Recommender Widget. First off, as disclosure, I do work for Amazon.com and might have had something to do with the widget. First off, it gets you the power of Amazon Recommendations to try and earn a percentage of the income. On top of it though, will provide recommendations for other pages on your site. Given my traffic here is pretty low, the recommendations for my pages tend to be based on the couple posts before or after the one you are on. It just happens to be how my readers are going through my site. But after crawling through my pages every once in a while something interesting pops up.
That said, if you have a site and an Amazon Associate account, you should try it. Also be sure to check out the helpful FAQ and performance tips.