This is a cheat for duplicating items. It only works on things like potions and certain ingredients though. For this cheat you need to have a bow, and two different kinds of arrows in your inventory. Equip the bow, and with the bow out, left-click to shoot an arrow. Just when you start to pull the arrow back in the string, hit tab and go to your weapons. Then select the arrows that you do not have equiped, and then select the arrows you first had equiped twice. Then go to your items and simply drop the item you want duplicated, and exit your inventory. Your computer will probably get alot of lag since there will be many instances of the same item spawning right in front of you.

This cheat does not work with all items, and the best use Ive found for it is duplicting something like skooma, and selling it over and over, or using it...