If you can't remember, you're not alone. A study finds that we try all kinds of ways to remember, distance walked, landmarks. But the best way is to use your guy. Apparently the study found men are better at putting to memory where the car was parked.  They are apparently  better at distance and spatial reasoning. While we women are better at using landmarks, but they don't work as well. 

You can read more about it here.  I use my kids. They work really well.