Joseph Rhea posted an interesting topic over at the Kindleboards Book Bazaar. You can make a word cloud of your novel, short story, etc. Word clouds is an image that gives the greatest prominence to your most frequently used words.
It's a great deal of fun and also a good way to see what words pop up the most often. It's free and you can find the link here:
Here's the cloud from "Quest for Nobility".
