I would also add that you should be confident and be yourself during the interview. You would not have been selected for in an interview in the first place if the employer did not feel your background was interesting and your qualifications matched the roles. So, you should have confidence in your accomplishments when talking about them.

Also, its important to be yourself. Well at least your professional self. Employers want to know what you would be like when they have to work with you each day, and if they feel you are holding back, or not being sincere with your answers they will be reluctant to take a risk and hire you.

Good luck to all you out there on the job hunt!