Your question prompts me to ask a question - what diagnostic have to undergone to assess that this is an issue?
Keeping your hands in your peripheral vision is a good sensation to capture.
Flexing your toes is another good one for standing on the flat of your feet - which is where you want to be. You want to stand on your tibia which intersects with your foot forward of your heel, just aft of your arch. If you stand too far forward your tails wash out at the end of a turn. I can also tell when a person's weight is too far forward - their ski tips in initiation and shaping phases tend to grab a bit and act nervously. As Tricia said, pulling your feet under you does the same thing.
My favorite is push the bush. However I use this more for getting students to keep their momentum - their energy - flowing from one turn to the next - no effort from the upper body but rather skiing from the feet and driving the outside hip, and driving the outside ski. Too often I see the telltale signs of core and upper body tension starting the turn, and speed at the end of the turn being controlled with a bit of checking. It is how a lot of patrolled ski. It works for them, but it is not the most efficient way to move down a mountain.
In many cases we are getting away from a pole plant except in bumps and when we want a bit of a blocking pole plant on steeps. A pole plant tends to be a trigger for other behaviors in skiers who have been at it a while, and for medium or long radius turns a pole plant does you no favors.
In all cases.... trying to get meaningful feedback off of a forum group has its limits. Working with an instructor who is skilled at MA and skis with a video camera will allow you to build body awareness and capture sensations that we can't even begin to address remotely. Just as all of the above have their place, I have about 6 - 10 ways to say the same thing. Some phases resonate with some, but not others.
Enjoy the journey.