Be sure to take advantage of the free tutorials at Word*tracker so that you're not wasting a lot of time trying to figure out how to do things.

What I did was search for lists of highest paying keywords, then I ran them thru Wordtracker to find long-tailed versions and cross-referenced them with Google's keyword engine. I have to admit, I was really disappointed with Word*tracker. I found Key*word Eli*te to be much better for my simple searches. Lots of folks swear by Word*tracker though.