This is the reason I have trouble going to the supermarket. I have to keep stopping and starting, and I've almost fallen a couple of times. I find myself holding on the the shelves or the cart to keep my balance. I find it helpful to take very slow careful steps like there are suction cups on the bottoms of my feet. This ensures, as Charlies says, to keep the heal planted on the ground.

The other thing I have found helpful is a good solid pair of shoes. I recently purchased some Dr. Scholls and they have a nice solid sole and heal on them. This really helps with the balance as the feet are planted flat on the ground and not turned in with the worn heal or sole.

John