Always try to gybe going down a wave, when the boat is going at its fastest. Make a smooth turn keeping the boatspeed up and pull the main across when you are swapping sides. Leap onto the new windward side with the mainsheet and tiller still in the opposite hands, being ready to make any course alterations (luff up if the boat is coming on top of you or bear away if it is heeling to leeward). Only once the boat is level should you swap hands.