Second of all.

Adsense thought by many to be a very useful tool.
I myself think of it this way:

Has anyone really been paid by google in a productive way?

Unless you are an employee of Google you can not be making such high end money as many have said they are making.

The best way to create an income is to not use adsense but instead use keywords in your sites meta tags.

Information is what is being sold not adsense!
Information is what people are in search of, not if you use right adsense!

With a proper website that has enough keywords is what spyders look for.
There is no one at Google that sits and watches you create adsense for you to make a huge income.

Everyone is saying I am at the top of the list!!!!
I pay to be at the top of the list and now I am at the top!!!!

One may stay on top of the list for a while but again drop down to number 2 or even worse number 500.

My final answer to adsense is this… Forget about them.
Work smart not hard!!!!!