How do you stop doing that if it's a habit you find out is very ingrained in you?

EG.. You are angry at me because I doubled parked. I tell you that the spot I pick was the only one available at the time I took it, and if that is no longer the case(cars have moved) it's not my problem. You are upset about something you do not have the right to be upset about.

I understand the above example is obviously...stupid. I am the stupid person that will argue with you that I didn't do anything wrong, since at that moment in time it was the only option available.

My question is.. how can I stop being like this? It's not good in my life, and negatively impacts my closest relationships.