Your guests may be staying on an impromptu visit, or without too much warning so they may not have all the toiletries they need with them. Provide a little basket in the bathroom full of fluffy towels, a hairdryer, shampoo, conditioner, shaving foam, soap, makeup wipes, toothpaste and perhaps a couple of cheap unused toothbrushes. None of these have to be full size or even particularly expensive. You may have stocked up on a few hotel freebies, but if not lots of places do perfect travel sized versions that will help to make your guests feel more at home.