New Blog Toy: Categories

Well, I've decided that since I've been blogging for over a year and a half, maybe I should find a way to organize my posts for easier browsing.
I've been looking into a bunch of different ways to do it, and for now have chosen the least labor intensive (since I have more than 500 posts) which actually uses search. It's ok for now, but doesn't quite get the results I want, as far as categorizing my whole blog, but if you are looking for info on a certain topic it should be fairly helpful.