1. Visitors
No manual visit no sales, isn`t so? well then avoid buying visit from any script maker and or exchanger since this practice won`t help you to get real visitor and the worst thing might happen "Google ads serving will be disable to your site if ever detected". The suggestion is : try to learn more SEO`s technique or maximize number of visitor by selecting the cheapest ads program for you to get more reader by marketing them through ads networks that work such as text link ads or in image ads.
2. Ads placement
Simple and crucial, showing ads at the closer part of your content will help a lot to increase click and clicks means earning!
3. Number of ads
You really need to try the in trial and error mode, Many publisher mentioning that they feel slightly increment by displaying only single ads slot while displaying other compatible ads networks to feel the free space.
4. Adsense HPK ( The Highest Paying Keywords )
This technique will be very interesting to mention since in the fact, if you can draw more visitor at this point you are at the closer way to be in the peak of your Adsense publishing success.
That is all. Thanks for your visit.