DH's optimization is ok, but you really need to spend the time to do it yourself. For instance: You could just choose general "law" for any topic having to do with law, and you will have a generated page of links having to do with law (But with a CPC in the .10 to .50 range). However, "law and government" , the context category, has only 1 link provided. Therefore, you have 3 to 4 more slots to use your "search term" for to get high paying ads in those spots. Then, use a keyword with a high CPC and smile all the way to the bank
-Allan