This shows your mind is focused on the job, not on parading around the office like a peacock. And behavioral expert Dr. Samuel Roll added: " When you sit down, don't slouch. Sit upright and back in the chair. " When you speak hold the interviewer's gaze. Don't look down or mumble. The interviewer will think you're hiding something or you don't know what you're talking about. Be direct and to the point. " Present your qualification in a direct, business like fashion. Outline your successes without sounding boastful or bragging. Always emphasize that you're willing to learn and work hard" And you should smile sincerely whenever it's appropriate. " A warm smile is a powerful weapon in communication and winning attention, " said Dr. Roll, a professor of psychology and psychiatry at the university of New Mexico. " Don't try to be overly familiar. Call the interviewer Mr. Smith,' rather than by his first name. " Don't try to use jokes to relieve tension. They can backfire and leave egg on your face." When you're introduced to someone new, "don't hog the conversation, " advised Waters, associate professor of psycology at Fairleigh Dickinson University in New Jersey. " Aim to make the other person feel important. " remember , you'll always make an excellent first impression if you're a good listener." Dr. Roll added: " keep the conversation upbeat and positive. "Aviod racial or ethnic jokes. The other person may laugh, but they can make him or her uncomfortable and resentful. If you are at a party don't drink too much. Slurring your speech or looking glassy-eyed shatters any first impression. " Waters added:" Don't in terrupt when the other person is speaking and don't ask for personal information. Don't be overly familiar by touching the other person to make a point.