Keep it simple
All too often players get tied up with technical theory when working on their swing.
If you have a load of swing thoughts wondering around your head then you are unlikely to make a fluid, powerful swing. I like players to have a simple picture in their mind of what they need to achieve technically. A ‘road map' so to speak. Here is a great drill that will help you with the shape of your swing and improve your rhythm.
I recommend that you start doing this without a golf ball. Place a tee on the ground and see if you can clip it. Work on this motion at home and you will be well on your way to developing a simple, dynamic and repetitive swing. Try this on the practice range. You will start to develop a sense of effortless power!
↑ 03: Now start down. If you let momentum be your friend then the shaft will come down on a shallower plane - just what all great players do! 03
↑ 02: With a nice relaxed right arm, swing the club so that you feel it swings over your right shoulder. Be sure to let your right elbow set (bend a little) 90 degrees. By holding the club lightly you will really sense the weight of the clubhead. 02
↑ 01: Take your normal set up with a 9 iron. Take your left hand off the club and put it behind your back or in your pocket. 01