Keep this in mind if you ever think “Gosh! I actually have to wait a few days or weeks to see which keywords and phrases pull what, and at how much in my particular niche!” and then think to yourself that it could always be worse (you could own a retail store and not know for many years if you are eventually going to do well or poorly!)
Fortunately, there are quite of few FREE tools out there that will help you, and a few paid-for softwares (that are dirt cheap!) that can help you as well.
For list generation use WORDTRACKER, and for Google AdWords education on manipulated the system in your favor by improving your Google results use Perry Marshall‟s Definite Guide to Google AdWords.
Here is a screenshot of Overture‟s FREE Keyword Selector tool:
(by typing) any most relevant keyword or phrase that comes to mind that you believe
is relevant to what you are offering.