Posture?

http://www.chicagonow.com/blogs/redeye/2011/01/tough-sit-how-perfect-posture-can-change-your-life.html

This article from the redeye focuses on the effect of posture on one's idea of a person mainly in the workplace but also provides handy hints many people can put to use. Studies show that people who sit up and have their arms spread seem to display more of an air of power and are more likely to get a job when being interviewed, but some can overdo this stance and come off as intimidating. Body language gives many people clues as to what others are like, including posture.