Some Google Adsense tips to maximize your site revenue:
1. Use ad background colors that match your site design.
The users only click on ads if they notice them. Using matching ad colors helps your users noticing your ads more often.
2. Place rectangular ads near your pages content.
Tall ads below on the left, and large ads at the bottom of long pages, such as pages with articles or forums. These are the heat map places where it is proven that the ads are noticed by the users more often.
3. Place your ads in typical exit pages.
Exit pages are those that the users tend to visit last before they leave your site after they got what they wanted.
Since the users are leaving anyway, they are more likely to be available to visit another site of related interests, which may well be one pointed by a targeted AdSense ad.
If you do not know which are your site typical exit pages, use a log analyzer program that is capable of providing that information. If you do not have a log analyzer program, Google Analytics can provide you that information. Google is offering free Google Analytics accounts now.
4. Keep trying different ad placements until you find what works best for your site.
Use channels to evaluate each different placement, so you can figure where the ads perform better.
5. Be a Google obeying citizen.
Always follow the Google rules. Do not ever click on AdSense ads, disclose unauthorized information, or commit any kind of fraud. If you are not sure whether something is acceptable to Google, ask them before you try.
6. Share your knowledge.
If something you tried is working well in your site, share it with other publishers that could benefit of that too. Sharing knowledge encourages others to share their tips with you.