Definitely wear a suit. I don't know if you are a girl or guy. If you are a guy, wear a tie. If you're a girl, don't wear a tie unless you have the outfit to make it work. 🙂 Wear shoes that are clean and polished (dress shoes) that match your belt/purse/suit. Make sure you hair looks good. Use crest whitestrips before hand (they make me feel more confident because I feel like people are judging my teeth too and i can notice a whiteness difference). Don't wear cologne/perfume unless it is really subtle. Get good sleep the night beforehand, don't go out partying because you are in NYC--go out after the interview. Drink lots of water and exercise and you will look fresh and clean. Hope that's not too much advice.
Jessica