I have been using adwords for about a year. I have done everything by trial and error. I haven't read any books or taken any courses. I use one keyword per campaign and if that keyword does real good i set up another campaign advertising the same thing using the same keyword but just changing the text ad a little. It seems to be working quite well. Is anyone else doing this or am i just wasting time or money?
One keyword per campaign seems really unnecessary (and you're limited to 25 active campaigns per account anyway). If you really need to differentiate that much, at least use adgroups instead (e.g. one keyword per adgroup).