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
Folks, EdZ's forte is helping people produce better Golf Strokes through visualization. His Swing Images can really help you make it happen. I always read carefully his descriptive thoughts and recommend the same to you.