Hold one arm out with your palm down and with the other hand push all five fingers up and back to stretch the flexor on the bottom of your wrist
A lack of connectivity between your lower and upper body causes the clubface to lag, so try this split-handed drill to get your lower body weight flowing through to the finish
One reason for Jack Nicklaus' greatness can be traced to the meticulous nature of his set up routine when he picked and focused on his intermediate target