In support of the latter, you should research the company prior to your interview and learn as much as you can about its operations and about the job for which you are applying. You also should practice answering questions for the interview. You can do this with a friend, in front of a mirror, or through a videotaped mock interview in Career Services. Generally, ten minutes prior to the starting time is recommended. Be sure to get good directions, including information on parking, when you are invited to interview.
Professional attire is almost always best.
For men, this usually means a suit with an ironed oxford shirt and a tie. To best plan your interview outfit, you should learn how people in the field typically dress, and strive to emulate their attire. Within 48 hours of your interview, you should have written and mailed a thank you note to the interviewer. This process will be easier if you have remembered to get business cards from each individual with whom you met. As with cover letters, it is recommended that thank you notes be word processed, on bond paper.