Short, well thought out answers are best. Practice what you are going to say, especially for broadcast interviews.
Wear a watch so that you know when a broadcast segment is up, allowing ample time to wrap-up your thoughts.
Ask for questions ahead of time. Avoid questions that speak off your agenda or that open up a Pandora’s box of things you do not want in the media.
You can also do print interviews via email if you feel more comfortable.
Make sure to mention your website!