Preflop Raising in No Limit Poker

No Limit poker is a different animal than the Limit game. In other words if you are used to riding a nice, predictable horse playing No Limit would be like jumping on the back of a North American Bison, digging your spurs into its sides, and hoping for the best. So if you are used to the nice, predictable betting structure of Limit poker, the culture shock of the No Limit game can be fatal. So when raising before the flop in No Limit poker, how much should you raise?