Stand with your feet hip-width apart.
Lift the toes of the leg you are going to exercise.
Feel your weight evenly distributed between three points under your foot; center of your heel, ball of your big toe and base of your little toe.
Maintain this feeling and let your toes relax on the floor.
Now move your weight over to the leg and lift the other leg off the floor and balance.
Keep your toes relaxed while balancing.