For anyone interested in doing advertising and have decided to go into the AdSense side of the Google advertising paradigm ( as opposed to Adwords) - I would highly recommend checking out their blog : Google - Inside Adsense Blog, link for the Adsense Academy
This link is nice in that you don't need to be logged into a Google account to look at the 6 steps. There is also a handy quiz at the end of each section so that you know if you are covering the right information that Google needs.
This information is great for bloggers, game sites, forums, classifieds, and news media centers, who are planning on running ads on their site with the content advertisers are looking for.
Does your site have what it takes? Google has a guideline for the right kind of sites and how they index them:
It may seem obvious, but do you know the best placement for the ad? check out that answer here:
Did you know that you cannot place an ad in an iFrame? That's in the quiz and more questions like this can be found at the AdSense Police Quiz:
Karen Thomas and the ClickActivate> Team