How to remember the number of your hotel room

If you don’t travel a lot, this may seem stupid, but if you’ve ever stood in the hall and wondered which room you are staying in this time, this tip from SignOnSanDiego is awesome:

Frequent business travelers use phone cameras to help remember which
ubiquitous rental car they’re driving and the number of the night’s
hotel room.

Take a picture of your room number or car!