BONUS POINTS FOR HOSTS
Sleep in your own guest bed. Look out for a lumpy mattress; unmitigated heat; and streetlamps shining through the curtains or lights blazing from electronics, like routers and cable boxes (consider darker shades, a square of electrical tape, or a clean eye mask). Listen for household sounds (such as noise from the dishwasher) that you may want to keep from creating at night.
Avoid bathroom awkwardness. Put out an odor-mitigation device, even if it’s just a book of matches. And, ugh, leave a plunger out so nobody has to suffer the shame of asking for one. Foster independence. Provide a spare set of keys for guests to use while they’re with you. If you live somewhere with public transportation, offer a loaded transit pass so visitors don’t have to buy their own.