HOW: Stand up tall on your tip toes. Then bend both of your knees slightly. Maintaining that slight amount of knee bend, slowly take one step forward. As you put weight on your leg, do no let your heel drop. Really push the balls of your feet into the ground. Slowly transition all your weight to that leg, then pick up your other leg and repeat. Pretend you are wearing high heel shoes.
FEEL: You should feel your calf muscles and quads working hard to maintain the position.
COMPENSATION: Do not let your heel drop as you put weight on it.