What is your favorite cheat in Oblivion?

To get this started, my favorite cheat would have to be the perm-invisible trick. This is how to use it:
Cast "Invisibility on touch for x seconds" on a horse, ride the horse, wait for the spell to expire than get off the horse.
If you put on armor you can see the armor, so if you put everything on but a helmet and remount the horse, your a headless horseman.