In heavy air you want to reduce area thru single, double, or even triple reefs, a flat sail shape, and no twist in the sail. To achieve this you want to tighten the outhaul, tighten the boom vang to remove the twist, tension the main halyard, tension the backstay and drop the traveller to the leeward side of the boat. Many of us trim the sail and keep the traveller amidships. In this way you can depower by dropping the traveller to the leeward side during a puff and then bring it back to the center after the puff. You might want to tell us what kind of boat you have..