Eat at Jean Georges, very cool, its at Central Park, full of celebs
http://www.jean-georges.com/
Got to visit Meatpackers district in the evening, also the Village and Soho are great areas to walk around
Take a meal at Danny Mayers Union Cafe is well worth it, one of the best restaurants in NYC
http://www.unionsquarecafe.com/
Visit Wall St and see the Golden Bull, also while you are down there you have Century21 which is a huge department store
Take in a Game, be it American football, ice hockey, baseball, they are so much fun
Get the ferry over to New Jersey, just because you can!! Its also a great place to photograph NYC
Its a wonderful town, hope you have a great trip