Know how to keep yourself calm. The best way to do this is to be prepared!
Research the company, there's no better way to show genuine interest that knowing about the company.
Research the interviewer, if possible. Knowing of their background can earn plus points.
Know what kind of interview to expect to be better prepared.
Try to obtain informational interviews with those in the industry
Know why you want the job.Telling an employer your reasons for wanting a position is essential
Identify your wants and your needs and know the difference.
Be able to express, specifically, the marketable skills you have to offer the organization.
Be prepared for the standard interview questions and know your answers to them.
Be prepared to answer that killer question.
Know how to deal with illegal questions tactfully during the interview.
Prepare questions you wish to ask only ask questions you can't find answers to yourself.
Line up your references in advance and verify that they will be good ones.