Another tip is to move weight aft just as you approach head to wind. Delay on crew moving to the other hull until you're past head to wind. These two things can dramatically improve your tacking since they help reduce the waterline by lifting the leeward bow up or out of the water and they create a pivot point on the original windward hull near the transom. Finally, as you reach the head to wind point, ease off the mainsheet. This prevents the sail acting as a weather vane which is what can put you in irons.