In reply to MG:
Try not to build up any impulses of pressure throughout the turn, so try and turn evenly (no sudden twist or push of the skis) and smoothly, with very slow up/down movements.
Being super patient with the turn shape (skiing bigger turns) will also help to spread the pressure.
Treat it like skiing on eggshells trying not to break any.
It's super tricky and requires a serious focus and 'tuning in' to what's going on under your feet.
Alternatively, in certain conditions, I ski really proactivley and very aggressively, just driving the skis through the crust. You need to go reasonably fast.