Lets face it Adsense is the major web revenue program out there but like all things it can be tweaked to get the best click through rate. So if you want to increase your earnings give these short tips a try.

Repositioning ads

Most people are ad blind is a statement you here a lot, I have said it many times and its true most people do ignore ads particularly if they are where they expects ads to be so how do you make people see ads simply put them where they are going to look!

http://www.poynterextra.org/eyetrack2004/main.htm

You could also try using heatmaps to see where people click

Blending ads in

Use Link units Link units are great for putting in some adverts in limited space or if you want a more seemless blend in with the site and with Google upping the number of units on a given page to 3 these little ads can bring in the dosh big time. http://www.doshdosh.com/adsense-tips-and-hacks/ultimate-beginners-guide-to-adsense-link-units-optimization/

Improve relevancy

Have you noticed how your relevant adverts don’t seem all that relevant sometimes? When your developing your site its worth making sure your ads stay as relevant as possible. http://www.problogger.net/archives/2006/11/16/how-to-improve-adsense-ad-relevancy/

Search for it

Use Google Custom Search Integrate your Google Adsense ads in your search results is an easy way to increase click through and with Google Custom search part of Google COOP its as easy as clicking the right link, of course you need to link your custom search into your site.
http://ventureskills.wordpress.com/2006/11/23/custom-search-engine-google-ajax-search-a-winning-combination/