The purpose of the putting stance is to provide stability, so that the upper body can rock the putter back and through with no movement from the lower half.
Stand with your feet shoulder width apart, bend over from the waist with a little knee flex and tuck your elbows into your sides. The eyes must be positioned over the ball.
TG Top 12 Teacher Adrian Fryer demonstrates how to get into this good putting set-up position.
Scroll down to see the basic putting stance instruction tip...