How can you remember where you park your car in a huge car park, with no signs for sections?
When you park in a large parking lot, how can you remember where you parked your car, especially if there are no signs to mark off sections of the parking lot?
When you exit your car, look out you'll end up using. In your eyes, mind, draw a line between this exit and your car. Then turn in the direction opposite and look for a landmark that is on the extension of this imaginary line. This benchmark is what you direction when you leave the mall. If it is really huge, look at the second hand of your watch when you leave the car. Watch it again when you reach the exit. These things will tell you in the direction of walk, and for how long.