Posture is one of the first things that I notice about people. It's a clear sign of a low self-esteem. People who have high self-esteem can value themselves, carry themselves well, care about how they look, care about how they speak and care about others in a way that people who have a low self-esteem do not. So the first thing that I look for is posture and slumping shoulders, not standing up straight. I am not talking about if you are kicking back, lying on your sofa, reading the newspaper. But if you are out in the world, the way you walk and the way you hold yourself are strong indicators of that unconscious self-esteem.