Create unique content for your blog and you will see an increase of gains in your AdSense and thus you will classify well in the Search Finders. The opposite of this is what many new bloggers do. They create a blog add some articles (2 or 3), soon they add its code of adsense and they leave it thus.
If you want to obtain a good Pagerank and high CPC and CPMs you must create an original blog, make your blog an authority in your niche.
The better paid key words : its useful to investigate around th web for the most profitable keywords in Google AdSense, you will earn more money with a site that has original content, authority, and that contains high profitable keywords. Obviously if you compete with highly competitive key words (that are the key words better paid) you are compiting against lot of webmasters and against well stablished sites, because of that you will have less opportunities to be successful, but if you succed you will have good profits out of your blog.
Improve the position of the Ads in your Site.
Avoid to put announcements in the lateral bar and replace it with inlaid great format blocks of ads between the content or the posts in case you have a Blog.
Here it is a section of code to do this possible:
Your AdSense code Here
This code causes that your announcements appear in the left part of your content. Some webmasters think that the first part of the site that get observed by a user is the left side.
You need to be careful that the quality of the clicks is not lowered by the location of the ads. Between more links out you have in your articles, you will have less CPC.