Show Up

I thought this would go without saying, but show up to your interview on time. In fact, show up 10 minutes early.

Let's assume your interview is in a location unfamiliar to you. Here are some suggestions:
1. Print a map of the interview location ahead of time.
2. Write down the phone number of the interview location so that you can call for directions if you get lost.
3. If you are running late at no fault of your own, call the interviewers and let them know your status well before the interview time.
4. Apologize for being late if you're late.
5. Leave your home/office for the interview early enough so that you have a cushion for unexpected events.