Figuring out the keywords / search terms which need to be included in the text on your web pages is no easy job but, if you want to gain good rankings in the SERP’s it’s a job which HAS to be done and there are ways to make it easier.

This article by Aaron Wall written for WordTraker.com is an excellent read for those of you considering taking on this task.
http://learn.wordtracker.com/articles/keyword-inspiration-aaron-wall-of-seobookcom-shares-his-secrets/