A good grip will help your wrists activate in the golf swing correctly and will add power, distance and accuracy to your swing.
A waggle is a great preparatory motion to get your wrists, elbows and fingers loose and ready to swing
The roll of the right leg in the swing is very misunderstood in golf, it is extremely important for control and distance, as the club comes into impact the right knee, foot and ankle roll in and at the finish the right thigh should catch up with your left thigh