One way to do it, quoting myself from the Rookies thread. Geri Tumbasz skis pretty well, so I suppose this technique is OK.
<<The following detail pertains to short radius turns. Standing across the hill, draw a triangle in the snow with a pole tip. The base of the triangle is the edge of your downhill ski, from tip to the middle of the boot. The other two sides of the triangle extend downhill, making a point that's halfway between the ski tip and the boot. Your pole plant will be at the point of the triangle, or back a bit from there toward the ski. At the time of your edge set near the finish of a turn, you should have brought your pole around progressively, and have tipped it forward and to the side. This is the ready position. The ski tip will be just a little off the snow. Use angulation to get the pole into the right orientation. If you're leaning into the hill, the tip will be too high. Make a firm pole plant during the transition, just at the time that the skis are flat, changing edges. It's a pole PLANT, not just a touch. You can put weight on it, use it as an additional aid to balance. Grasp your poles strongly, squeeze them, especially with your little finger. Let go with that one, and the pole will be flopping around. Make a strong frame with your arms and upper body. Both hands should move through the turn in a quiet, steady, strong fashion. No "milking the cow."
Now use that pole action to enhance your turn quality. Keep the skis together. On release, pop into the new turn. Use rounded steering to shape the turn. If it's firm, scrape the snow. Create your platform. Move into an edge set in the finishing phase. Remember, you need that moment of stability to facilitate the release. Have the pole in the ready position. Look downhill. "Face your fear."
Another drill. From a standing start, go straight downhill, make one turn with strong steering, bring the skis to an edge set, and ride them around until you stop. When you stop, have the downhill pole in the ready position, but do NOT make a pole plant. Instead, HOLD the edge set--you will probably start sliding backward, so just hold the skis in a backward carve until you stop again. The whole "system" has to stay strong to make this happen. This is NOT a hockey stop. There's no sideslipping. There is turn shape.>>
For more on Geri's thinking about pole plants, have a look at his discussion with Paul Simpson of SIA Austria:
Something else to think about, mostly in short turns, is the physics principle of conservation of angular momentum. Finishing the old turn, your body, or at a minimum some part of it, is rotating at a pretty good clip. Somehow, some way, you need to reverse that, in order to start a new turn in the opposite direction. It can be done only by transferring some part of your angular momentum to mother Earth. The pole plant can help with that.