DO arrive before the appointed time. This will give you a chance to relax.
DO act polite but not over polite. "Yes Sir," "No Sir," and "Thank You" can appear to insincere if used too frequently.
DO act confident but not over-confident.
DO shake hands firmly and stand until offered a chair.
DO thank the employer for the interviewing you.
DON'T use the interviewer's first name unless asked.
DON'T take anyone with you to the interview.
DON'T smoke or chew gun, even if the interviewer does.
DON'T tell a prospective employer about other companies that turned you down.
DON'T apologize for lack of experience or training; stress your strong points instead, such as you ability to learn quickly, assume responsibility, etc.
DON'T watch the clock.
DON'T ask to use the company telephone.
DON'T put anything on the interviewers desk.
DON'T mention influential friends or acquaintances in the organization.
DON'T try to be funny.
DON'T make elaborate promises.
DON'T plead for a job.
DON'T hang around after the interview.
DON'T forget: You are the winning candidate for the job!!!