You've probably heard that increasing the separation between your shoulder and hip turns is what produces more power, especially on tee shots. In other words, turn the shoulders and restrict the hips.
That's one way to do it, but most players don't have the flexibility it takes to accomplish that. The good news is, you can still get a bump in clubhead speed by making a few adjustments to your technique.
Start by flaring out your feet slightly at address, which will help you turn your body back and through. On the backswing, allow your upper body and lower body to turn away together, and try this little trick to get more shoulder turn at the top: Swing to your top-of-the-backswing position, then turn your head away from the target and look up at your hands. This move will give you a little extra room and the flexibility to turn your shoulders a bit more. Get that little extra turn, then look back down and make your downswing.
Work on this move a few times using slow swings without a ball, and you'll start to feel that added backswing rotation happening on its own, with no need to look back.
Jeff Ritter runs MTT Performance at Poppy Hills Golf Course in Pebble Beach, Calif.