It is true that we dont get as much expected amount on Google adsense, it is not always because we nt capable or something than those who earn but perhaps we are not giving our 100% in our blogs.. I have seen many people who have no idea about publication and copyrights, they simple just copy paste the posts from other sites. which results in a lower or no page rank, eventually no traffic and no earnings. A there is a small tip dont make a blog simple for earning money friends if u only think of money you may loose your interest in writing and will be more bothered abt how much $$ u just made.
Guys please send your tips and suggestions on how we can improve more and earn more.