Originally Posted by ssh
For me, on the other hand, it's been very difficult to get the remnants of those habits out of my skiing.
Aye. There's the rub.
And Coach, "efficient" has many definitions.
Sorry for hijacking your thread.
My own advice (as someone who has skied a bit of powder in his day but is not an instructor) is very similar to much of that above.
* Feel your skis. That can mean pointing them into the fall line and building up a little speed until you can feel the snow exerting some flex pressure on your skis.
* If the snow is untracked and the pitch is fairly moderate, start to "bounce" a little. That will give you the "floaty" feel at the top of the unweight. If you combine that float with a bit of direction change, you just made a turn.
*Stay centered. Fore and aft as well as on both feet. I know it's easier said than done, but if you can keep your weight relatively even between skis and over the middle of the skis rather than on the tails, all this is going to work much better with much less fatigue.
* Be a bit patient. Today's skis will literally turn themselves if you can put your weight in the right place. Instead of trying to add a lot of upper or lower-body motion to torque the skis around, let the skis make most of the turn. They will if you let them.
* Use wider skis than you might be used to. I'm not a huge advocate of way-wide skis in the kind of powder skiing most of us get most of the time, but a ski waist between 75mm and 90mm (depending on your weight) will really make life easier. Just don't fall in the trap of hanging back on the tails of a fat ski and sort of steering them around. It's an easy trap to fall into and you'll see a lot of skiers doing that on a powder day.
* Take a lesson if you can. A good instructor can shorten the trial-and-error phase enormously.
Most of all, have fun and I hope you have lots of snow to learn in.