Use Potions Multiple Times (XP Exploit)
Upon using a potion (or food) that grants experience (of any kind), immediately pause the game. This causes the game to fail to realize that the potion was consumed; it will still be visible in your inventory. Then you can reuse the same potion, pause again, and repeat. I have only successfully managed to get this to work 5 times in a row, but if your timing was perfect on the pause, I suspect you could repeat this as many times as you wanted. If taking too long to pause the potion will be consumed, but if trying to pause to soon, the game will not allow you to pause.
Added by: Guest May 23rd 2012, ID#8412