Originally Posted by spud
you can go the super cheap route, pick the gear you like, put it in that gear and clip the derailuer cables and remove the shifters. a very time efficient SS too, and you probably wont even have to wash grease off your hands.
I built a pretty quick and simple single-speed bike for my friend by popping off the rear cassette and buying a spacer kit a tmy LBS for 0 bucks. Works great, the only part that was dirtyish was taking off the derialleurs and re-making the chain.