Shape the
sails to the conditions first. So in heavy air, vang. Cunningham, backstay and
outhaul are cranked on.Then trim with the sheet. If needed set a lower Traveler position when cruising. When
racing, I would leave the mainsheet tension and play the traveler before easing the sheet tension.
When,
racing I put a reef in when I can no longer balance the
boat with a tight sheet and fully extended traveler. When cruising, I would reef when I start spilling
beer
All of this is to windward of course.