If you want to appear credible, try not to move too much. "Do not fidget, twitch, wiggle, squirm, or scratch," Lowndes says. Frequent hand motions near your face can give your listener the feeling that you're lying or anxious.
Hang By Your Teeth
This visualisation trick will help you look more confident with your posture. Visualise a leather bit hanging from the door frame and pretend that you are taking a bite on the dental grip, and let it sweep your cheeks into a smile and lift you up.