It's also true that the longer the club, the more weight you need behind the ball at impact. For example, a driver is hit with a sweeping, level blow, while a short iron is hit with a crisply descending blow. To accomplish this, it stands to reason that your ball position must vary throughout the bag. When you address the ball just barely pass your hand between you hips and the butt end of the club. That puts the ball in a pretty good position.
Truth is, however, that good players angle their left foot out slightly.
In other words, they turn their toes toward the target. This helps them release their body at full impact, as well as gives them a slightly broader, more secure base to swing from. Finally, I would like to suggest that players, especially older folks who may have a tough time making a good, full pivot on the back swing, toe out their right foot as well. This little correction will not only help you turn more easily, but it will also prevent your weight from getting to the outside of your right foot, which can lead to swaying. That's about all for now, but next time I'll give you some more suggestions that I hope will help your game, plus I'll tell you a quick story or two about a couple of the fellows I have played with.