A little trick I use for room labelling. Place a token hidden by fog of war on the top edge of a room. This allows the room label to only be seen by the GM. Also during play if a player token moves onto the label it magically moves out of the way.
The drawback is if the player moves her token onto the fog of war/token location she disappears. This leads to cries of terror as the player thinks she has accidentally deleted her token. Solution for this is to have thick walls to hide tokens in.