Oooo you lucky thing, me & dh went for a week a couple of years ago and loved it.
We did most of the sites too, Empire State building (we booked our tickets online over here so we didn't have to queue), Central Park, Ground Zero, Grand Central station (totally amazing), Statue of Liberty and that's just naming a few

We stayed at The Waldorf Hotel too which was fabulous. And dh was kind to me & spent 4 hours in Macy's for me and 3 hours in Bloomingdales, lol.
I am so jealous now

You will have a fab time
Have a look online for things to do/see that's what we did and we bought a great travel book for visitors.
Do you need a visa, we didn't?