Normal posture, weight evenly distributed
Eyes over the ball
Grip is more in the palms than for a full swing, thumbs are on top
Ball is forward of center
Arms and shoulders form a "triangle"
Maintain and swing the "triangle"
Match backswing to follow through
Vary the length of the swing (NOT how hard you are hitting) for distance control
Experiment with 5 inches of backswing for every 10 feet the ball needs to travel
Vary the length of the swing. NOT how hard you are hitting.
Here is an example of how to practice putting in 10 foot increments