Stand up straight!
1. Set your feet about shoulder width apart and rest on the balls of your feet.
2. Knees unlocked.
3. Hips straight (be aware of "sitting in your hip" off center).
4. Spine straigt and aligned.
5. Should back, slightly down, and release any tension.
6. Look straight on with your chin parallel to the floor. Notice if you raise your chin to the ceiling or tuck it into your chest. Try setting your pointer finger just under your chin and your thumb against your chest, to form an L shape, as a guide to a parralel chin.
Try it in front of a mirror.