Someone who speaks in a monotonous tone and not excited by what he or she is talking about will quickly be forgotten. Do not forget, many of these interviewers see many potential recruits a day, especially if they are doing on campus recruiting. An enthusiastic person will be the one, if he or she has the necessary qualifications, that will remain in the interviewer's head long after the day is over when the decision has to be made as to who makes it to second and third rounds. Do not fiddle with your pen or display any sort of nervous tick. Unfortunately the interviewer will catch it right away and may become annoyed.
Knee shaking, nail biting, pen twirling are no-no's during the interview.
Develop a Rapport with the Interviewer Try and develop a rapport with the interviewer. Not all interviews are regimented question and answer periods. There is room for discussion and dialogue. You might feel comfortable right off the bat with your interviewer. You might even slip in some humour.