Incorporating golf-related stretches into a normal exercise routine will increase flexibility and even help solve your swaying problem
Maintain a constant posture throughout the entire swing so that your body does not move towards the ball during the swing and cause the heel of the club to make contact with the ball
The baseball swing is very similar to the golf swing and you can get a great feel for the backswing, downswing and follow through by making baseball swings above the ball and then hitting the ball with your golf swing