Co-worker came across this yesterday, and I had to immediately read it word for word, bookmark it, and setup a post for Keefr.com.
I’ve used some cool plugins to make the WordPress Admin your own, but these are some cleaner things to make the admin area your own — and cut out the fat that you (or your client) is not utilizing.
All of this articles’ tips involves getting into the PHP, so as always, make back ups, and try to familiarize yourself with PHP and its syntax as you add, edit and delete.
This is a good start on customizing WordPress. The plugin mentioned in the article’s comments, (Adminimize) is a nice plugin-based solution as well.