Tsu Dho Nimh offers up this great write-up including links to a text analyzer that shows your text’s words as a cloud tag. Very useful for analyzing your keyword density. Her article includes a short primer on using the on-line service and some tips on making effective use of the cloud. I highly recommend the read and the cloud tag software.
Using Tag Clouds to Improve Your Search Engine Optimization by guest contributor Tsu Dho Nimh.