Most people know to look at body language to really know what people are thinking. If you want to know if someone is paying attention to you in a conversation, fold or unfold your arms. Most people that are listening will instinctively do the same thing. Body language can tell you if another person is listening, engages, flirting, thinking or even happy or sad. Amy Cuddy comes to TED and adds another layer. Your body language can tell yourself to be happy, sad, withdrawn or powerful. After watching this Talk, I tried to adopt a power position before big meetings. I guess the old motto is true: Fake it 'til you make it.