One of my most frequented internet destinations, Art of Manliness, has just put up an article and video on the always cool, but fairly impractical, art of knife throwing. Proper technique and the three primary types of knives are all covered, so you can start learning how to effectively chuck that pocket folder at any hunks of wood or would-be assailants in your path.
Art of Manliness – How To Throw A Knife Like Bill The Butcher