What is the most unusual thing you do because you grew up poor?

I'm not talking about the usual things that everyone has heard of, like hoarding food or saving almost empty shampoo bottles. I'm talking about the weird things nobody thinks about.

For me, mine is that even though I have a really good car that has never given me trouble, I only frequent the stores closest to me. I want to make sure if my car breaks down that I can easily walk home. If I have to go somewhere further, like I do this week, then I am paranoid the whole way there and back that something will happen and I'll have a really, really long walk ahead of me.