Stand at one side of a room or floor. Face the wall. Give yourself enough space to glide all the way from one side of the room to the other. To start, wear socks, which provide more movement. As you become more confident, switch to shoes. They should have a smooth sole; the more ridges they have, the harder it will be for you to move.
Place your feet close together, with your right foot lined up with the middle of your left foot.
Rise onto the ball of your right foot.
Lower your right foot slowly and slide your left foot back, raising the heel. All weight should be on your right foot so your left foot appears weightless as it moves back. These two moves should happen simultaneously; practice it until you've mastered it.
Shift your weight to your left foot by raising onto the ball of that foot.
Repeat steps four and five using the opposite feet.