Unless your head and your hips are positioned properly at the exact moment of impact, there is little chance you will hit the golf ball the way you intended. Actually, the position of your head should not be a problem since it is constant during the swing. At address, your head should be slightly behind the ball—and it must stay there. The hips, however, are in motion throughout the swing, so they pose a different problem. At impact, they should be moved through the ball (past a parallel to the intended line of flight) and open to your target. Proper control of your hips at impact will insure 1) the correct shift of the majority of your weight onto your left side, and 2) the right shoulder movement. And all this helps you hit the shot you want.