Make Sure You're Getting The Best Adsense Ads
Here are some simple and proven official suggestions from Google's Adsense Team (I received it in my adsense account) that can help you maximize your AdSense earnings from your blog.
Opting into Text and Image ads increases the competition amongst the ad inventory available to appear on your site, as both text and rich media ads (image, flash, video and gadget) will compete in the ad auction. Rich media ads generally result in Higher eCPMs than text ads. AdSense will automatically display the ads that will yield the highest earnings for you.
Implement Top Performing Adsense AD Formats
In general, wider ad unit is better. Wider ad units allow for more horizontal text than their narrower counterparts, and as a result are easier for users to read and interact with.
The three ad units above are the preferred ad units of adsense's advertisers. These ad units have the most inventory available in adsense ad auction, which typically results in higher CPMs for adsense publishers.
Google Adsense recommend that Bloggers must place a 300x250 Medium Rectangle right below the first post and add a 160x600 Wide Skyscarper within the right sidebar of their blog. You can also either add a 728x90 Leaderboard at the top of your blog or for longer entries, use additional Medium Rectangle between the end of your post and the comments section.
Consider Where You Place Your Adsense Ads
Certain locations deliver higher adsense earnings. Take a look at blog's Heatmap to see which areas of your blog are likely to perform the best.
Adsense Link Units Monetize Small Areas on Blog
Once you've added three AdSense ad units, you should add up to three additional link units to provide complimentary, space-efficient advertisements for monetizing smaller areas on your site. Link units are just as simple to configure and insert into your site as regular ad units and take up very little real estate as well. Each link unit displays a list of topics related to your site’s content, similar to a regular ad unit. When a user clicks on one of these topics, they’re brought to a page of contextually relevant AdSense ads. As a publisher, you’re paid for any clicks on this resulting page.
Google's Adsense team encourage us bloggers to try these Adsense Optimization tips on our blogs and wish all continued success with AdSense.
Article Source: Official Adsense Message/Newletter I got in my account.