Park next to a car (far away) that is as nice as yours...or similiar.
When I drive my Jeep Wrangler I always park next to this guy/gal who just got a 2011 4-door tan (Supermarket) Jeep Wrangler.
Have yet seen anyone after shopping parked next to either vehicle.
In the VW GTI...I park as far as possible.
Or next to a nicely *tuned* Honda/Subaru WRX or other German car..........
My doors (2-doors) are too heavy and don't want to accidentally ding someone else's car.