Pay Attention to Google's optimization tips
Spend a lot of time reading about tools provided in Resources section. Tools like Channels and Google Analytics are very powerful tools if you can master them. Read up on topics like color palettes, placement of ads, to use image or text ads, website optimizing , Always keep
experimenting to see which combination of Ads, placement, colours work best and stick with the best performing one.
Use Other Income Sharing sites
If you are en expert on any subject or even have some valuable information, use it to post articles in different places which allow you to place your own AdSense codes or share income directly with you. Google Knol is a good place to start , you can post informative articles in your area of expertise. Here you can add your own AdSense codes for additional income. For information which is more casual you can use Xomba.com, hubpages etc to post articles to earn that extra bit of income by adding your AdSense code.
Use Keywords to attract relevant ads.
Don't be afraid proper keywords to attract high paying ads on your site. Suppose your site is about beaches , you can enter names of popular beaches like Miami Beach to attract ads etc. If your site is about cellphones Use blackberry or similar keywords.
Make your Site more navigation friendly
Visitors always want to move on after visiting a page rather than sit there. So instead of making them close your site why not make them navigate your own site by adding navigational links like ' Related Articles' , ' Next post ' or Adding labels under every post.
