You should make traffic for your website using known methods like article submission, social bookmarking, social media marketing and social networking. In this case you make a good traffic for your website and then you make more money from your adsense account.
apart from unique content and good keywords one more thing is very important for adsense earning. That is placement of ads, if your ads is not at right place then you will not convert your traffic to clicks. Keep one ads between your articles and make it OPEN AIR.