The more you know about the company and the position the better you can customize your answers and attributes. In addition, bring a list of references. Arrive ten minutes before your scheduled interview time. This will make a good impression and give you a few minutes to collect your thoughts. Try to relax.
Preparation is key to a successful interview.
Tailor your responses to questions by speaking in terms of the specific position. Emphasize how your qualities will benefit the company. Listen to the questions and give examples to back up your answers. Be specific and try not to ramble. If you feel you have answered the question - stop, smile at the interviewer and await the next question.