Remember, when placing your decoys... always place them close, this will help lure in a bird as close as possible... in case he decides to hang up.
Also, remember that a Tom that comes into decoys will nearly always approach a Jake decoy from the FRONT, to face him. The same Tom will also nearly always approach a Hen from the REAR. Take advantage of this predictable approach to time you shot and/or your movements.
Good luck and good huntin'