If you happen to face a job-of-your-dream interview, here is some good advice.
Leave nothing to chance. Prepare any unthinkable scenario. There is no replacement for hard work especially when you get only one shot. Project a good image. Take your cue from the interviewer. Keep it positive and do not stress out about it. Do not adopt a deer-in-the-headlights look if you get hit with one of those funky queries. Stimulate your creative juices. Have a spiel for every single question they could possibly ask you.
Look critically at yourself: Do you have a booger popping out of your nose, or are you presentable?