Use powerful body language - 抬头挺胸，张开双手。
Avoid powerless body language - 低头微缩身体，双手交叉。
Give yourself 2 min every day
Imagine you are very powerful, use powerful body language
Start in private place, and then show it to all people.
Body language changes your mind, your mind changes your action, your action changes your habit.
Fake it, until you become it!