When you get to the mall, airport, etc. and want to remember where you park, pull out your trusty iPhone (or iPad) and fire up the Apple Maps app.
In the bottom left corner of the screen hit the blue triangle to locate your current location. This will bring up a blue dot on the map, which you can tap. Next tap "Current Location" then use the Share button in the top right corner. You can now add a bookmark to save it.
When you are ready to find your car, use the Bookmarks button in the top right corner of the Maps app to pull up your bookmarked locations. Be sure to delete it if you won't use it again.