Lots of draw shot technique advice, along with demonstrations of everything people do wrong and right, can be found here:
Concerning the grip and wrist, many (if not most people) get into trouble by tensing up or trying to force a wrist flick. Much better accuracy, consistency, and power come from keeping the grip, wrist, and forearm as relaxed as possible. The wrist flexes on a power shot, but it should do so naturally, without being forced.
Jim, I enjoyed meeting and spending time with you and many others at the Instructors Summit. I already look forward to next year's event.