I use http://www.emacswiki.org/emacs/key-chord.el http://www.emacswiki.org/emacs/key-chord.el to great effect. Lets you bind arbitrary commands to arbitrary key

I use http://www.emacswiki.org/emacs/key-chord.el http://www.emacswiki.org/emacs/key-chord.el to great effect. Lets you bind arbitrary commands to arbitrary keystrokes. For instance, I have switch-buffer bound to Z+X, which is just a short distance away and more efficient than C-x b for my tastse.