There are some words I have a higher value if clicked other than words. Words is called High Value Keyword. While you should not pursue this value, there is no one you try to find happiness mengincar high value keywords.
You can get through high value keywords http://www.memwg.com/adsense-niche-ideas-1/ site. You will have many words, from the letter A, such as:
- Accounting software
- Addiction treatment
- Adjustable rate mortgage
- Alaska cruise
High value depending on the keyword bid from AdWords. The list always changes from day to day so you should always follow the trend if you want to optimize your AdSense