Skiing
Going from intermediate to advanced is to throw off the bad habits they taught you in skischool. The main offender; the snowplough.
This teaches you to stand up, to scrape/skid out your edges as a way of staying in control, to keep your weight between your skis, and to turn by u weighting from your uphill ski and weighting on your downhill ski. All of these are bad habits. You can get away with them on the piste. They will kill you in hard terrain.
ABT: Always be turning
Turn with both skis: do not pick up that inside ski. Use it! This is a vestige of the turn as a last resort in moments of panic technique.
Hike out: you centre of gravity almost never between your skis.
Bend ze knees;
Turn with both skis