There are several ways to grip the club but there are three constant pressure points that must be observed in order to generate power and keep your lag through the downswing
Hitting the sweet spot of your putter has three advantages, it comes off the face more consistently, with more energy and has over spin instead of side spin
The position of the ball in your stance is determined by your swing shape and the club you are hitting. Your wedge should be near the center of your stance and your driver should be off your front heel.