A solid stance is the foundation of an effective swing. The purpose of the stack and tilt stance is to maximize the golfer's ability to consistently control where the club hits the ground [source: Plummer].
Here's how you do it: Stand centered over the ball with your shoulders aligned with your hips. Flare out your feet and tilt your chin down toward the ball. Keep the majority of your weight -- more than 50 percent -- on your front leg throughout the swing.
As you begin your backswing, swing your hands inward, using your turning body to create an inside swing path. Your hand remains "packed in" throughout the swing. Turn your shoulders in a circle and tilt your spine toward the target, creating a steep downward angle with your shoulders vertically aligned over the ball. Stay over the ball. Do not shift your shoulders or hips back (this is probably the most noticeable difference for most golfers).
As you begin your downswing, keep your hips tucked underneath, lean a bit more into your front leg, straighten your back leg a bit and flex your front knee to set up the downswing thrust. You should feel like you are swinging down on the ball, not laterally through it [source: Finch]. Keeping your head still on the downswing, slide your hips forward and flex your torso forward as well, so that your spine tilts away from the target. Spring up on the ball as you release your hips from their address tilt and don't let your head go forward. Your shoulders should be square at the point of impact. The effect will be to push up and through (note that your belt is nearly level and much higher than in a typical swing).
Finish the motion, continuing to push the hips forward and extend the spine, shifting 90 percent of your weight onto your front foot. Stretch out your arms to complete the swing. When practicing, try ending your swing halfway, with your arms held parallel to the ground, to habituate yourself to the feeling of extension [source: Finch].
Now that you know the basics of the swing, let's take a look at why stack and tilt is worth learning.