At lunch today I did librarian. I was on with Sasha. When I got there, there were lots of books to put away. It took a while. When that was done there wasn't much more to do so I sat at the front desk in case anyone wanted to get books out or return them. At about 1:25 we closed the library and I played King for five minutes before the bell rung.
The value I showed was be resilient by staying for my duty even when there wasn't much to do.