Maintain links to relevant websites. If you think some sites are better off than the others, put your ads there and try to maintaining and managing them. If there is already lots of Adsense put into that certain site, put yours on top of all of them. That way visitor will see your ads first upon browsing into that site.
These are some of the tips that have worked well for Buy MapleStory Mesos
some who want to generate hundreds and even thousands on their websites. It is important to know though that ads are displayed because it fits the interest of the people viewing them. So focusing on a specific topic should be your primary purpose because the displays will be especially targeted on a topic that persons will be viewing already.
Note also that there are many other Adsense sharing the same topic as you. It is best to think of making a good ad that will be somewhat different and unique than the ones already done. Every clickthrough that visitors make is a point for you so make every click count by making your Adsense something that people will definitely click on.