One of the recurring dreams I have about being at Bob Jones U is that I have to get something out of my PO box and can't remember the combination. I can remember the box #, 50618, and even picture where it was in the room of PO boxes, but in the dream I need to get my chapel seat assignment or my class schedule or I'd be trying to get my ID to get lunch and I can't remember the combination.
At Christmas, my sister was showing me the random things in her Bible and she had a piece of paper with my PO box combination on it. I was thrilled. The anxiety of not being able to open it was gone. I flied it away carefully in my subconscious so if the dream comes back, I'm armed with the information.