What do you do?
I'm trying out a new line. When people ask that inevitable, American question of "What do you do?" I've changed my answer from the standard reference librarian response to this: Sales. The inevitable follow-up question tends to be "Sales of what?" to which I reply "the Spokane Public Library. I sell the library."* It's fun and it immediately gives you the opportunity to pitch your collections, services, awesomeness, etc. You should give it try. *You may want to substitute your library's name for fear of getting some really strange looks if you aren't from Spokane.