Using the Google AdSense Section Targeting will help the ads being displayed be more releveant to the content on your pages. This plugin lets you determine the areas of your site that will be used to select ads. You can find out more about Section Targeting at the following URL:
If you have questions please leave them in the comments at the plugin homepage.
Fixing PHP Short Tag Issues
Corrected issue when the loop is entered in the sidebar
Am now using the Shortcode API for the [ignore] and [/ignore] tags in posts
Removed option for Comments as there is not valid way to know the start/end of comments loop yet.
Added check for W3 Total Cache and warn to allow comments when minifying
Added the ability to ignore inline content of your post by using the [ignore] and [/ignore] tags in your post. Just type this at the beginning and end of a section you wish for Google to ignore when selecting ads.