This story is for you if...
• You swing hard but still don't drive it very far.
• You rarely feel like you "got all of it."
• You try to keep your head still during your swing.
The Conventional Wisdom
To develop a solid swing that you can repeat, you need to keep your head still during your backswing.
Why It's Wrong
The most natural thing your head can do is float with your body as you coil behind the ball. If you try to keep your head still you'll leave your weight over your left leg. This leads to a reverse pivot, the most common and most damaging power leak.
What You Should Do Instead
Here's a good swing thought for your backswing: Your head should move enough so that your nose points at your right foot at the top. If you're in this position, then you'll know that you've transferred your weight to your right side and are in the correct spot to deliver a powerful blow to the ball.