These tips were published by Forbes.
Do not touch your face
If you touch your neck, face or ears when talking, you are sending signals of unease, hiding something or lying. The best rule is not to touch your head at all when interacting with people around you.
Keep eye contact
Maintain constant eye contact; your eyes may wander only when you are thinking about an answer.
Adopt a straight and open posture
Be sure to have the right posture: shoulders back, head up, chest forward. This shows confidence.
Beware of blinking too much
Blinking too much signals nervousness and uncertainty. This is why you should keep your blinking under control when trying to look confident.
Offer a firm handshake when being introduced to someone
Your handshake should be firm and confident, but not excessively so.
Pause before answering
If someone starts talking immediately when it is their turn, people may assume they are afraid of soon being interrupted. A self-confident person knows other people are interested in what they have to say, which is why they can allow themselves a short pause for reflection before beginning to speak.
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