What a great article from the Washington Post's "Campus Overload" blog about reference librarians being a student's "secret weapon" when working on a research paper.
I would also add that we are great at lowering stress levels. By the time students come to us, they are often so stressed out about the information they need to find. Many have already tried, and some have even become convinced there's nothing on their topic. However, we're willing and able to help, and we won't stop until we find them something.