A while back, someone mentioned wordle.net in the comment section of a blog I read (I can't remember which one.) This tool creates a word cloud of any text you paste in the program. Aside from being fun to do, it lets you paste your whole novel in the box. The resulting word cloud will tell you which words you overuse (those will be the largest words in the cloud) in your novel. Great for getting the big picture. I realized after I ran my first novel through it that my characters were sighing a whole lot. :) Here's an example using the text from this blog. Click on the box and it will bring you to the wordle site. Enjoy!