If i have anything to do with it i buy sets of red and green sheets and guys. You'll notice that i don't have much to do with it.
Jackie, in 2000 I was entered in the PacCup on OmegaI, a good friends's boat. He met a guy who knew everything, and we picked 3 other crew. He picked a "really great" bow gal, and two other of the owner and my mutual friends...and began practicing. Turns out Ms Bow did not know the pointy end, so we practiced at the dock one day. Especially when Mr KIA missed. He had gotten all the sheets, guys, and twingers for us. We had more fun that afternoon: all the lines were white with red threads. Starboard AND port! The twingers were substantially smaller, that helped a teeny bit.
The gybe practice at the dock was very, very helpful because our gal could catch the rhythm of the gybe bringing the kite from one side of the boat to the other.