It can be lonely to travel for work. Especially if you're an auditor and auditees aren't always thrilled to see you. That's why I find it comforting to bring along a shelf full of cat knick-knacks. Don't forget to bring some for the hotel, too.
(OK, this isn't actually my stuff. This is the office I was put in to work last week while out of town. Good thing I'm not a dog person!)