Other than at address, you don’t fix balance. Lack of balance tells you something else is wrong.
Here are a few. This is nowhere near a comprehensive list. These are a few common ones.
All of these assume being balanced at address.
1. If you are on your toes at the top of your swing…odds are you took it way too far inside.
2. If you are on you your heels at impact, you probably straightened your spine or pulled off of it.
3. If you lose your balance toward the target after impact, you probably got in front of the ball before impact.
These are just a few of an almost infinite number of things listening to your balance can tell you.
Being balanced through the whole swing allows you to swing as hard as you want and still be under control.
Don’t let the “swing smooth” crowd tell you that you are out of balance because you are swinging too hard. Swinging smooth is just a bandaid for bad balance and masks the real problem.