Much has been said about the “one-piece golf swing.” First of all, a less-complex swing means fewer bad swings. Secondly, it is easier to perform it repeatedly with similar results so you will begin lowering your handicap. But for all its supposed simplicity, the one-piece golf swing still requires that your body's various parts work together in the right sequence. For that reason, this swing requires practice with careful attention to a number of details.
Avoid completing your shoulder turn before before your hands and golf club reach the apex of your swing. Too often, when you try to take the club back in a single motion, your shoulders turn faster than your hands and you'll have a tendency to lean a bit towards the target, robbing you of both accuracy and distance. And when you do this, you will also need to compensate for the clubhead to be in the right position at the point of impact.
Try this simple technique to get all your body parts moving in the right sequence. Rather than taking the club back, then cocking your wrists when the club is parallel to the ground, try making the latter move first. By cocking your wrists at the beginning of your swing, you have improved the likelihood of reaching the top of your swing with your shoulder and body turned, and your arms and wrists completing their journeys at the same time.
Begin your downswing by shifting your weight to the side closest to the target. If you have reached the apex of your swing correctly, your downswing should be on the same plane as your backswing, and you should begin to feel more comfortable swinging the golf club.
Practice makes for a perfect swing. Even the professionals work on their timing every chance they get, and so should you. What past players like Julius Boros and Sam Snead have in common with current players like Charles Howell III and Ernie Els is they all seem to hit the golf ball a great distance with little physical effort. The reason is timing.