Summarize this article:

Non-verbal communication is important to displaying confidence to others. Displaying behaviors that seem confident can also help you feel more confident on the inside.  Stand up straight and tall. Posture is an important nonverbal communication in terms of wanting to appear confident. Slouching and slumping over are signs of insecurity or depressed mood. Smile and Laugh. This shows that you are comfortable and in a positive mood. It can help to set your audience at ease. Extroversion predicts self-confidence; the more social you are the more confident you may feel. Instead of hiding or avoiding people because you feel nervous or insecure, try jumping right in and focusing on connecting with others. Say hello to people before your presentation. Ask them about their day, and make small talk. Try to avoid discussing your presentation too much because this could increase your nervousness. Simply focus on the conversation you are having with the person. Common emotions associated with low self-confidence are: nervousness, anxiety, stress, fear, and depressed mood. If you accept these emotions instead of trying to fight them, you may be able to change your behavior and increase your confidence. Say to yourself, “It’s okay to feel nervous. This is a natural emotional and is appropriate for this situation.”

Summary:
Act confident. Interact with others. Accept your emotions.