1-You should make your Adsense ads look as a part of your web page.
2-Text ads are better than image ads.
3-No Border ads.
4-No other advertisements.
5-Placement
Even if you have the best Ad, people will not respond if they don't see it instantly. The best place to see the ad is the top of your web page and the next is aside your document's text. Visitors will click it more frequently since it will look like your text.
6-Traffic
Try to use legitimate ways of traffic. Some people use Google Adwords and other Pay per Click search engines. The problem here is to search very carefully for the right niche and keywords in order to make your campaigns profitable.
7-Do not rely on one website
Yes you can make money with one website but try to make as more as possible.
8-Relevant content is King
9-Use site maps
Google's site maps visit your site and crawl it much sooner that any other submission process.
10-Relevant ads
It's one of the most important factors for Adsense success. If the internet user can't find relevant ad in your page he or she won't click the ad.