We all know that readers become “ad blind” very quickly after they start visiting a blog or website. Instead of constantly using the same exact ads over and over and over again try a few things that will improve you click thru rater. It has improved my CTR substantially.

Use something like Adsense Manager and create at least 3 different ad campaigns for each of the categories your blog has. Whenever you post a new article use a different campaign and this will move the ad around, give it varying backgroud colors and because it isn’t in the exact same every time people are more likely to see the ad, and click the ad.