Undoes all that cute-shoe damage. Place a thick book (Webster's dictionary works well) on the floor against a wall. Using the wall for balance, step on the book with the ball of your right foot and let the heel drop toward the floor. You'll probably feel a stretch in your calf muscle; imagine it elongating, soft, like taffy in a pull. Hold the position for 20 to 30 seconds, then repeat on the left side.