Toss the snow over your right shoulder to feel your backswing, toss it over your left to feel your throughswing
backswing - grip the top/handle with your left hand
downswing - grip the top/handle with your right hand
use "lag pressure" when filling/scooping the snow - steady smooth pressure, feel it supported from the ground up
And as Burner pointed out.... you simply must stay in complete balance

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"Support the On Plane Swinging Force in Balance"
"we have no friends, we have no enemies, we have only teachers"
Simplicity buffs, see 5-0, 1-L, 2-0 A and B 10-2-B, 4-D, 6B-1D,
6-B-3-0-1, 6-C-1, 6-E-2