Best pizza in NY. Be prepared to wait. Check to see if they are shut down by the health department or tax collectors before going. Get the square pie with pepperoni and hot peppers.
The Brooklyn Flea is another treasure trove of odd finds, cool artifacts, and handmade goodness. If you're looking for inspiration or just something cool to hang on your wall, you can probably find something here. And if all that treasure hunting leaves you hungry, you are in luck--there's a delicious assortment of local food vendors and artisans there too.