Duncan points to Andrew’s article on AdSense Mega-Earnings:
The Super AdSense earners are not any smarter than your average person. I know many people think they areâ€¦ but for the most part, they are regular non techie people. They are smarter in one respect thoughâ€¦ they use the latest tools available to them to automate most of the tasks involved with researching and creating sites. They use the latest keyword, site creation and search engine optimization tools available. The tools they use are their secret weapons.