Most guitar methods will try to pass on a lttle advice, and Chordman is no different:When you play for people, pay attention to whether you are you playing to GIVE or to GET.
Playing to GET is when you are trying to recieve attention, admiration, praise etc. - whereas playing to GIVE is when you are hoping to entertain, and enrich the experience of others
Of course we all want both, but playing the first way will get you neither. Playing the second way however, can actually improve your performance, and is a big help for getting your mind off stage fright.