Pretend you're dizzy and lightheaded. Walk slower, with shorter steps. Take your time when getting out of bed or a chair. When you stand up at your desk, pretend to lose your balance a little bit and put your hand on your desk to "regain" your balance. To remember what being dizzy feels like, wait until you are in private and spin around until you get a little dizzy. Make note of how it feels and how you're acting. When you're in front of others, replicate that behavior, but only slightly.
