The clip below is from the August 8 NBC Today Show broadcast discussing the difference between confidence and attitude, and how body language plays into the image you portray.
Although this is a light, short piece, both of the Doctors that are featured have valid points to make. Dr. Gail Saltz stresses that matching your strengths and coping skills to match or outmatch what the environment may throw equals confidence. That fits into one of my favorite equations: your behavior shift to accommodate the person +/or the situation). Dr. Saltz goes on to suggest that you can boost your confidence by monitoring the running dialog in your head (or the story you are telling yourself) and knowing your strengths and weaknesses. Boosting your confidence can be attached to how you cope with both personality potency and weakness.
Dr. Janine Driver was a Federal Law Enforcement Officer for the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) who specialized in detecting deception. Her knowledge has recently been de-classified and her book, "You Say More Than You Think: A 7-Day Plan on How to Use the New Body Language to Get What You Want: Read and Fix any Situation in 7-seconds or Less!" will come out in 2009.