I always come here instead of the NYU Postal Center across the street, when possible, which is basically always, as the hours and services and attitude are much superior. Besides always being able to handle my mailing and shipping needs, the owner (cute lil elderly lady) has even, on occasion, let me buy stamps 'on credit' when I didn't have enough cash. I certainly remembered to come back and pay her and it's little things like that, that will keep me coming back. On my way right now to purchase Christmas stamps and mail my cards! *One drawback: I had a pre-paid UPS box and they charge a $3 drop off fee. If you're NYU, there's a UPS drop off box right inside the Health Clinic lobby.
Pros: super helpful, open later than USPS