You will most likely hear a lot of people raving about creatine... creatine does work (it is in fact one of the energy systems your body has) and will help you with your lifting (for the 8-10 seconds the creatine system is active)... however, water retention is a big issue with creatine and can lead you to believe your cutting (if you are cutting) progress stalled.
It should also be cycled, though