<p>If you honestly think you're unlucky for being able to get an interview for Harvard, you may want to rethink whether Harvard is a place where you'd be comfortable.</p>
<p>You should just try to relax. There is no preparation needed, and you don't need to bring anything, except yourself and who you really are.Try to have the attitude that you are also interviewing them, which is supposed to be part of the deal. Ask questions about Harvard, and use the interview to make sure it is a place you would like to attend. (Why are you applying to Harvard, apart from the name and prestige?) For instance, did the interviewer like the Core Curriculum, are a lot of the classes large, or taught by grad teaching assistants, are students competitive or cooperative in general, and ask about extracurriculars that you might be interested in.These interviews are not a big deal, and don't play a huge role in admissions, and you should just try to enjoy it.</p>
<p>You don't need to prepare (much). Check out some of the interview threads, both here and on the parents forum. Get a friend or a parent to ask you some of the questions so that you feel comfortable talking about yourself. Really the only way an interview will sink your application is if you come off as incredibly arrogant, silent, or incredibly uninformed about Harvard (i.e. if asked "Why Harvard?" have something more to say than "it's famous".)</p>