During the Interview Dress professionally. It is a good rule of thumb to dress more professional than the person who is interviewing you. When in doubt, it is always better to be overdressed than underdressed. Remove any jewelry that would be distracting to the interviewee. Do not wear any perfume or cologne that would distract the interviewee.
First impressions are very important.
Arrive 5-10 minutes early. Smile, speak clearly and maintain good eye contact. Answer all questions honestly. Do not give answers that you think the employer is looking for. Remember, you are the person who will have to work at that job.