Oh this is brilliant. Why haven't I thought of this?

I travel a lot for work and always take a pic of my parking space number. A few weeks back I forgot to, realized I forgot before I got in the security line and was like.. nah, I won't forget on a short trip.

When I got back later that week I walked the entire floor of the garage, about 25 minutes.

Yea, hiding one in the car is a great idea, too.