Without appearing contrived do try and mention any research you have done during the interview. It generally goes down well. Think about the questions that you are likely to be asked at interview since some of these can be quite predictable. At the end of this page are some examples of interview questions. If you can think of the answers to the 'worst' 5 potential questions, this will help ease any apprehension considerably.
First impressions are vital.
Know your own CV - it is amazing how many people fail at interview because they haven t read their CV recently. It is important to be able to discuss any aspect of your CV such as why you studied a particular course at University, or the part that you played in a particular project. Make sure you remember any relevant dates or qualifications. Ultimately the interview is a two way street. As well ensuring that you sell yourself to best effect, you should also be considering questions for the interviewer on aspects of the role, such as prospects for career development and the 'corporate culture'.