The next thing you need to do before settling on the keyword terms is check the competition for each term. The Wordtracker tool I mentioned above has a tool for that but I prefer to go straight to the horses mouth - Google. I take each keyword term, type it into Google and click the search. If you see that there is several million to several hundred million other sites competing for that keyword term, you may want to pick another instead. For sure you don't have to but the more competitive your terms, the longer it will take to get top search listings.