Prior to the interview, you should spend time thinking about who you are, what you want, and what you know and can do. A personal assessment of strengths and weaknesses, future goals, and accomplishments will help you prepare for the interview. Draw on examples outside your study experience in interviews. Reread your application and be prepared to expand on your examples or back-up your claims. An interview is a poor time to be confused about something you claimed in your resume.
Most employers gain an impression of maturity and judgement by examining overall appearance.
Carry a pen, spare resumes, list of references, and other necessary documents. Plan to arrive 10 minutes early and spend time preparing mentally for the moments to follow. At the interview try and relax. If you cannot hide your nerves acknowledge it to the interview panel, whether it be one or twenty. Usually, they will be sympathetic and will try and help you.