My favorite short game training aid is the Hack Motion Wrist Sensor. It’s a wearable device that connects to your iPad and provides real-time feedback on your lead-hand wrist conditions (crucial for short-game success). It can also be used to provide instant biofeedback. Although it’s pricey, it is versatile enough to be used for full-swing training as well. It’s changed the way I teach short-game, and expedites the learning curve for my clients.
My advice: Find a knowledgeable coach who teaches with the Hack Motion sensor and can help you understand how to use your wrists effectively- It’s that good.