Come up with a plan. Take some time to consider how you'll use each of your keywords on your varied pages and how you'll link all of the together. You might want to get a biro and paper and draw out the way the pages will be connected to one another. Don't forget to use hyperlinked (words folk can click on) keywords in some places. Don't go overboard. If you use far too much of the same keywords on the same page, the search websites may think you're trying to cheat and could penalize you for it. After all , there's one thing you don't want people to do when they get to your site, and that's's to depart.
Check your competition. In other words, use each of keywords in a search site and see how many competing pages there are. The more the pages, the harder it is going to be to rank higher. Take some extra time and click thru on the initial few results. The best keywords are those having a lot of searches, but not a huge amount of competition. The truth is that these words can be hard to find. Hence while you check your competitors, you shouldn't get too hung up on it either..