Missing one point: take a couple of business cards from the hotel with you. Whenever you need to get back, it most often makes it easier for people (cab drivers) to get you there without too much discussion and misunderstandings.
Other points: - To be sure you have some clean water in your room, bring a few small water bottles. - Avoid the in house WiFi - Do not order room service - Have a family photo / familiar item on your bed stand, so that if you wake up in a panic, you know you are awake and in "your own room" - Don't invite people into your room - Personally I like to unpack, even it is for a short stay, since it make me feel more comfortable and less "on the run" - Give the cleaning people a decent tip (if they are allowed to accept it) on the first possible occasion and make it clear who you are and what your room number is, and what you expect from them (clean / leave alone etc.) - Use the in hotel services like shoe polishing, tip them well. These people know everything going on - Order cabs via the lobby - If possible, let the lobby pay your taxi when inbound
I do not miss traveling professionally.