There are a few the things that you can do to prepare yourself mentally the day before the interview. It best not leave it until the day of the interview though.
• Remember your strengths and weaknesses and know exactly what you want to say and don't want to say during the interview. Identify your key strengths, with examples from your past experience, that you can describe to employers. This will help them visualise you as a strong candidate. These examples should be as relevant to the company as possible.
• Remember the problem areas in your record and be prepared to offer a good explanation for these during the interview. Hopefully these areas won't be touched upon, but it is best to be prepared. Resolve and commit yourself to never volunteer negative information about yourself or a former employer.
• You may want to write out practice answers to possible questions from the interviewer. Seeing your answers in print is training your subconscious mind, which will help you during the interview by recalling what you had written the night before. That kind of memory training is only good for 24 hours, so only do this the night before.
• You can do a mock interview with a friend or relative. It may even be a good idea to videotape yourself to lend a whole new slant on things. Be aware of the fact that most people don't approve of the way that they look or behave on videotape. We especially don't like the sound of our voices. Don't let this phenomenon effect your confidence. You can't change your appearance overnight, or a lifetime of habits. However, do observe your performance for obviously negative things that you would find off-putting if you interviewed someone. Only keep one negative observation in mind, because that will be difficult enough to remedy during an interview.
• Memorise your list of questions that you are going to ask the interviewers.