A Charlie thing that I do whenever I'm in a hotel room: Sketching the Room (maybe called Sketching the Bed) before leaving.
Part of his lore is that he'd make a sketch of his rooms when on tour.
I opt for a quick iPhone pic over pencils/charcoal/graphite, tbh. And "Sketching...." had become personal/family shorthand for "didja check the drawers, fridge, bathroom, and under the bed..... to make sure we got everything??" before checkout.