Higher Click Value

Check out this site(iotaweb). It's a great reference for all AdSense publishers. You can perform searches to determine which contextual words will generate the highest revenues.

From a quick search, the best rates I found were on search terms like 'Conference Call Services', 'ATT Call Conference'. Other big winners were Loan and Debt consolidation. In particular 'Federal Consolidation Loan' and 'Home Equity Loan Rates'.

Keep these in mind when targetting your site!!