When you want to use Google AdWords, how many keywords that match the ads you want are you supposed to use to make sure you get the highest paying ads on your page??? The adwords are placed on a site that I write for - and I get paid when people click them, depending on how much the ad pays, you get the idea... so of course I want to write keyword heavy articles - but how heavy do I have to go? I have heard you should use a keyword 7 times for it to be effective - is this true???