Create torque between your torso and waist to unwind your body faster and increase clubhead speed
Keep your left heel flat through the swing and to start your downswing by keying on the resistance created by the foot, straightening out the left knee and allowing it to start a chain reaction as it first clears the hips and then allows the upper body to rotate down and through
Improve your impact by keeping your hands and body moving at the same speed, many times the body slows down for the arms and creates a hands swing where you are better off having the torso rotate and bring the arms along