If you're driving a rental or loaner and need a way to see the GPS on your phone, as long as you have a rubber band, you have a smartphone mount. You'll also need a pen or any other object that can go through your car's air conditioning vents.
Thread the rubber band through the top of the vent and pull it out through the bottom. Snap both ends around your phone, so that it's held from the top and bottom. It won't conceal your screen and still hold the phone in place, ready to use.
Obviously, the ideal solution is to buy one of a good smartphone mount, but if you're in a rental or a friend's vehicle, this is a nice trick to go hands-free and much easier than using office supplies.
5 Awesome Car Life Hacks [DaveHax (YouTube)]