Parking at the curb
When curb parking look ahead out your windshield rather than at your side mirror.
In the picture to the above you can see, from the drivers side view, the curb is to the right of one of the screws in the windshield wiper. This puts it a little left of center of the hood for me.
When I see the curb in this position I know my vehicle is about a foot away as in the picture on the right.
When parking at the curb, come in slow and give yourself plenty of room so you don't have to turn you wheels sharp.
Turning too sharp or coming in at much more than 5 mph risks bumping and scraping and damaging you tire and cars alignment.
Parking in front of the curb
Have you ever wondered how to know you won't hit or scrape the edge in front when perpendicular parking?
The answer is in looking at the curb using the side view mirrors. Place the view of the curb under the side view mirrors.