Smile, think positive thoughts, pay attention and stay positive in interactions with others. Keep in mind that most people don't like criticisms and sarcastic remarks.
Because the feelings are in part reflected on the face and body, we tend to judge other human beings and their character to a certain extent by facial expression, manner, carriage and dress. A few of the methods used have become organized into specialties, such as the study of the head or phrenology, the study and analysis of handwriting or graphology, the study of the hand chiromancy or palmistry, characterology etc. All of these systems are really “materialistic” in that they postulate so close a union of mind and body as to make them inseparable.