Maybe I do no how to ski powder maybe I don't. The problem is I havn't got any shot at it yet. Hopefully that will change when I take my trip to Utah.
--Weight centered on the foot, not forward, and not back. If you can develop the touch, practice with weight on the ball of the foot very briefly when starting the turn and very briefly on the heel (not sitting back) when finishing the turn. If you don't do subtle, don't try this movement.
--Weight equal on both feet all the time.
--Feet close together (not locked together)
--Patience when turning...on a slope that isn't very steep, take your time and let the turn develop. In powder on a steeper slope you'll go at about the same speed due to the resistance of the snow against your skis, feet, legs. Tighter turns are made by greater edge angles in the skis & legs, not by pushing your skis to the side faster.
--Learn to carve your skis. Skis on edge (and on edge early in the turn with no rotary steering movement), allow the hips to come across the skis to the inside of the turn, counter balance with the upper body, and the other movements needed.
--Learn arm movements that help your body movements and don't hinder your movements. As always, you want the inside shoulder and arm high and forward, and the outside shoulder and arm low and back. You want pole plant arm movements that don't pull you out of the good position.
--If you're in the habit of leaning back toward the hill for that false sense of security, don't. Learn proper angulation and counter for true balance.