Stay organised in your hotel room with this one weird tip. When arriving at a hotel room clear the desk and fold a bathroom towel or flannel to make a little square space and use it as a store for all your useful stuff.
OK, so it actually does seem a little unusual, but having tested it on all hotel stays over the last few years I can say that it genuinely helps me not lose key things, like room keys, around my hotel room. It also reduces the chances that I'll leave without something important like a passport. Maybe give it a try.