Squat, then jump up for power
Players trying to break 80 have learned how to square the clubface at impact, even if it means manipulating it with their hands. Often they thrust their hips toward the ball for power (left), then flip the club to square it.
A better power move is to use "triple extension" of the lower body: the ankle, knee and hip joints fully extending through impact without moving toward the ball. My Squat and Jump Drill promotes pushing off the ground. Holding the head end of a driver, squat down on the backswing (below, left), then jump up and sling the club into a line with your left arm at the ball (right, right). You'll get triple extension and straighten your arms -- secrets to great driving.