I`ts dark, you are tired , you are trying to open your car door to get in, You are getting annoyed What`s up?

That happened to me many times with my previous car which was a somewhat ubiquitous model/colour. I was always attempting to get into the wrong car. Luckily my present car has one of those battery operated key fobs so when I press it in the approximate vicinity of the car, the lights will flash. It also helps that I've never yet seen an identical car to mine in the four years I've had it.