Enjoy the city (as those of us in the area call it). Tomorrow is supposed to be cold, but sunny.
If you are a foodie, don't miss Eataly (23rd St and 5th), Chelsea Market (9th Ave and15th St), or if time is limited, the Lexington Avenue Marketplace in Grand Central.
There's also a holiday fair with ice skating and kiosks in Bryant Park behind the New York Public Library (42nd St)