Footwork is crucial when tacking or gybing. Move your feet across the boat only when you yourself have to move across. Premature footwork can cause capsizes.
Many people gybe by standing up and pulling the tiller to windward, crossing the boat and centralising the tiller as the sail comes over. Skiff- style boats are better handled by continuously adjusting the tiller as the boat turns, only making a large tiller adjustment if balance becomes a problem.