for my new-york-knowin' peeps...

at some point over the holidays, i might take a day trip up to NYC... i've never been there during xmas, and am thinking of going up there since i have the time. any advice on what to see or do, besides the tree in rockefeller center and the macy's window display?... what else says "xmas in new york" to you? i'm a bit clueless.