Lunch to go in Cobble Hill
+1 on Cobblestone.
also, Sahadi's has lots of great takeout options. I love their spiral spanikopita and their mediterranean salads. They also make pita sandwiches, but I've never tried them. While you're at it you could also check out Damascus a couple doors down - they also have some good middle eastern baked options and sandwiches.
Paisano's is for good Italian deli sandwiches.
Ted & Honey has nice sandwiches and salads (though their dollar per portion ratio is higher than the above places).