The Mobio Go ($35) is a small, sleek car mount that attaches to the dashboard of your car.
The base comes with a 3M VHB adhesive which creates a semi-permanent bond between the mount and your car. (You can remove the mount by using a few drops of alcohol to dissolve the adhesive.) The base will attach to any vertical or horizontal surface.
Using the same adhesive, you attach a magnet to the back of your phone or its case. The magnet will then snap onto the round metal ball on the base. Adjust to your desired angle, and you are hands-free and ready to go.
When you are at your destination, your phone will easily detach with a slight tug.