Before coming to the topic let me tell you Google Adsense is an advertiser network of google, which shares the revenue by placing the ads on our website.
I frequently get mails regarding low adsense earnings, So I am here with this method will actually increase your adsense earnings by atleast 30%.

Optimize ads position: This is important because your position need to such that the ads get maximum exposure from visitors. This location include left side positions, below the title, inside the content, after the content. Also one thing should be kept in mind is not to exceed more than 3 ads in one page, as it will keep the CTR (click through rate) high.

Remove low paying ads: main thing is how to find the low paying ads. These ads may be one of those ads which runs on impressions eg: 1$ per 1000 impressions. So its better to keep experimenting with the site that are mostly displayed in your pages. These ads can be filtered in adsense setup menu in adsense -> competitive ad filter. Enter only 3 to four website and test if those ads works for you.

Target advance countries user: Targeting the countries like US, UK will help you get high ranking for your website in that country, So in these region the advertisers usually spend huge amount of money to advertise their products. So this will surely gonna help us.

Let me know if you have any doubt about this post. Tweet this to your friends, as knowledge shared is knowledge earned.