Get a roll of green, a roll of white, and a roll of black (or red or blue). If you don't have a wire caddy, put a piece of 1/2" EMT through your rolls, and have the rolls held up by something stationary (a ladder works well), so the wire spools off easily. Push a fishtape through your pipe, tie on your wires, and pull. If you don't have a fishtape, use a shop vac to **** a string through the pipe and use that to pull. If you don't have any crazy bends going on you could even push the wire from box to box, just bend a small loop on the head of the wire with one wire and tape the other two tightly and neatly to the looped wire. The loop will allow the wire to slide through couplings and connectors without hanging up.