When perpendicular parking, stop once you see the curb under the side mirror. This way the distance between the car and the curb will be minimal, and you won’t scratch the bumper.
When parallel parking, make sure you don’t scratch the hubcaps. Stick a piece of colored duct tape to the bottom of the windshield. Stop once the mark matches the curb line. It’s better to parallel park in reverse: this way, the curb is visible in the side-view mirrors, so you won’t be too close to it.
