Know what to avoid. You’ll naturally be thinking about what you want to
talk about. But also know, going in, what you don’t want to talk about. “Set boundaries” by making notes of topics you plan to discuss and keep an eye out for “topic drift.”
Keep it short. “Limit your responses to three sentences or less for print media and a single sentence for television.”
Don’t make friends. Remember, the interviewer is not here to form a friendship. He or she “will use anything you say—especially the asides.”
To stutter is human. You can mentally prepare, but “don’t try to be perfect.” In television and radio interviews, “a little stuttering” shows
you’re human.”
Source: Wired