The more the merrier! Like it or not the holidays often means having a houseguest or two. I don't have the luxury of a spare room but if I did, I'd be all over the domino instant guest room guide, making it lovely's brand new guest room (complete with guest!), and for those with or without spare rooms, unclutterer has a guide for preparing for your guest without creating clutter.
Anyone working on getting their spare rooms (or living rooms) together for guests? What's your limit for the length of stay?