Have you ever had trouble finding your car at the airport?
One time when I was often travelling for work I went through Melbourne Airport on 9 consecutive days.
I had no idea where my car was by the end.
That is when I started using my camera phone to take a photo of the car park location.
Always make sure that either there is car park zone sign in the background of the picture, or take a photo of the nearest sign!
I have been using this travel hack for around six years and never lost a car since.