food-wise:
* have pizza, pizza is good. not sbarro's.
* have a bagel. The best bagel you can have is a fresh (untoasted) everything bagel with cream cheese (plain, *maybe* scallion) and lox (or some similar salmon product) with red onion and capers.
* go to chinatown (or better yet to flushing). wander around until you find a place that you haven't read about online, a place where they barely speak English, order whatever they say is good. if you get soup dumplings: use the chopsticks to put a dumpling in the spoon. poke a hole in it. let the soup and steam vent out a little. then eat the dumpling. It is too hot to eat any other way.
parks are good.
shopping is fun. if you're not in the mood to spend, just try thrifting or going to a sample sale.
stuff that's kind of conventional and kind of touristy but good anyway:
* broadway. enter some lotteries, try the tkts booth, see a show. off-broadway shows are good too, but there's something about a big production... you gotta see one.
* the holiday markets
* ice skating (especially if her bf is in the mood to propose by the big christmas tree, that's a big cliche here)
* the bronx zoo, the met, moma, the brooklyn botanical garden, the frick, the intrepid museum, the tenement museum, lots of museums and shit.