Pole plants...Have the pole ready to plant before your skis reach the fall line so you can quickly plant and turn anywhere that looks good. The plant should be straight down the fall line from your feet, not a big swing ahead. Reach way down the hill when planting.
Retraction turns...Yes! Add a very strong pullback of both feet at the point in the turn transition when both feet are light. Rule-of-thumb--if the ski tips are off the snow you have no control. How does one get their ski tips down to the snow? By this strong pullback. This is what's shown in the dolphin turn, but I don't know of very many skiers athletic enough to do that trick.
Aim hips & shoulders down hill all the time. Never allow yourself to rotate toward the hill.
Maintain the strong inside half with the inside pole/hand/arm/shoulder/hip high and forward. The outside pole/hand/arm/shoulder/hip needs to be low and back.
Keep your balance over the outside ski with both feet rather close together.
Keep your balance centered fore & aft. If you get back on your heels, either recenter with the strong pullback of the feet, or just stop and start over.