Did you know that if you structure your websites better - you will earn more money from Adsense? The structure determines what ads show - you need relevant ones and also determines how you site is viewed by the search engines - hence generating more free organic traffic. These 2 principles can increase your profits dramatically. http://gerrywalter.com/adsense-tips/the-best-adsense-website-structure-for-maximum-profits/ I wrote more about this on my blog if you are interested at the link above.