Hopefully this will give some of you hard working guys some ideas. My methodology with my web sites is to choose topics with which I am familiar and they are typically business, finance and employment. You make real good money with business and finance KWs in adsense but employment doesn't pay all that well but if you get a lot of traffic and you place your ads correctly you'll do OK. I generally interlink my sites so I get crossover traffic from similar/same niches and that is nice as you get a chance to make money off the same visitor on several sites. The other day I was checking a KW because the traffic from some of my sites was a little unusual... one that got most of the traffic was a little light and 2 others that were "ancillary" sites picked up some. I google XYZ jobs (these are employment sites) and Lo and behold, I have 4 spots on the first page with 3 different sites. Think about that; 40% of the organic real estate was mine on page 1 of Google for this one KW phrase that has About 9,860,000 results (0.16 seconds) when you enter it in the search box. You do not need to make sure that your site has the top position in Google if you have 40% of the organic real estate and that is not so hard to achieve... all you do is get one ranked, build another one and use unique content and do similar things you did to get the first one ranked. Build a network of similar sites with similar KWs and do all the right things to get them ranked, interlink them and put some extra cash in your pockets.