Golf tip 6. Ruler drill

To hit straight shots, you need to get the club in a good position at the top of the backswing. If your wrists bend unnecessarily here, you’ll find it hard to square the face through impact. Place a ruler down the back of your left wrist (use your watch to keep it in place). Now swing slowly to the top of your backswing. The ruler will act as a splint, keeping your wrists locked into a solid position. This simple drill will help you keep the club in a strong position at the top. 

Andrew Jones, Top 25 golf coach