DRILL: HOW TO PAUSE AT THE TOP
The biggest problem that most players have with iron shots is rushing the transition. So when you practice your iron shots, exaggerate your pause at the top. Instead of a 1-2-3 count (1=takeaway, 2=at the top, 3=downswing), try a 1-2-2-3 count (1=takeaway, 2=at the top, 2=still at the top, 3=downswing). The pause will make it impossible to rush your downsing and help you ingrain a smoother transition.
Address is beat No. 1.