"Mess." It's a mess. Nobody's going to be able to find anything, and he hates a messy room, a messy living area, a messy workspace.

At first he gets them all in one pile, by date, oldest to newest, all straightened out in a stack, meticulous. Good. ...Then he frowns. Would it be easier if it was newest to oldest? He has to take it apart, restack it. There.

...No, no, but that's too big. He has to sort it out by topic, style, publisher. Take the stack apart again.