Fixing the Handsy Golf Swing
Some golfers have less rotation of their body and swing too much with their arms.
When you do that, you'll have less weight shift. You won't hit it very far from there.
The reason why you forget to turn your body and shift weight may be different from person to person. Some golfers have too much tension in their grip. Some golfers get too quick at the start of their takeaway.
To prevent you to use too much hands during the backswing, you can try what Jack Nicklaus and Greg Norman were doing.
Hover the Club
At address, Jack and Greg were not resting their clubhead on the ground. They were holding it just above the ground.
Greg Norman said there are two reasons why he was using this technique.
First, it kept his grip pressure constant. If you rest your clubhead on the ground, you tend to regrip the club. But holding it above the ground will prevent you from doing it.
Second, this technique was letting him to promote very smooth takeaway. By hovering the club, it will let you to rotate your body in connection with your arms.
So if you feel like you have handsy golf swing, try this technique. It should help you rotate your body.
At address, you should think about "Turing your body" instead of swinging your arms. If you correctly rotate your body on the backswing, you will have a plenty of room to swing your arms on the downswing.