Your body language can strengthen your chances of getting through the interview :

• Shake hands with the interviewer(s) at the beginning and the end of the interview.
• Maintaining eye contact is a very important aspect. Always maintain direct eye contact. Fickle eye movements suggest insincerity.
• If you slouch or hang sideways in your chair, it might give the impression that you are not that interested in the job. However, sitting on the edge of your chair can come across as being a little tense and might give the impression that you feel uncomfortable.
• Sit up straight, and lean slightly forward in your chair. In addition to projecting interest and engagement in the interaction, aligning your body's position to that of the interviewer's shows admiration and agreement.
• Folding your arms across your body can be interpreted as a defensive move. It is better to let your hands lie loosely on your lap or place them on the armrests of your chair.
• Don't rub the back of your head or neck. This shows that you are not interested. Rubbing or touching your nose suggests that you're not being completely honest, and it's gross.
• Speak clearly but not too fast: a deeper calm voice suggests authority, whereas an excitable louder voice suggests a nervous personality.
• If more than one people are interviewing you, you must pay attention to both of them and return your attention to the person who has asked the question.
• Good posture and a friendly expression will indicate that you have a positive approach.