hi
The more ways are avaiable to improve google adsence earnings,i write some of the ways
Choose a color that will go well with the background of your site. If your site has a white background, try to use white as the color of your ad border and background. The idea to patterning the colors is to make the Adsense look like it is part of the web pages. Again, This will result to more clicks from people visiting your site.
Remove the Adsense from the bottom pages of your site and put them at the top. Do not try to hide your Adsense. Put them in the place where people can see them quickly
Concentrating on one format of Adsense ad.