Just had an argument with the staff of a car rental company office. My wife picked up the rental (our car is in the body shop). I told her to make sure they gave her all the proper papers, before driving off the lot. I pop home on my lunch break - sure enough - she forgot to check - and sure enough - invalid/expired insurance papers, etc. I had to go back to the rental office on what was left of my lunch break - so they could correct the paperwork. Admittedly, I was already irritated, and running late. Did they apologize for our inconvenience ? - No Instead they gave us lip about how it didn't really matter if we drive around with incomplete/incorrect/expired permit and inurance. I told them that they were wrong - but they continued to be beligerant. I got mad - and we left. Later - I called and complained to our insurance company (they had arranged the rental) - they said they would look into it, and get back to me. My wife thought I handled it improperly (should not have gotten mad), and now fears that they will hassle us, when we return the vehicle later. I get that I did not "keep my cool" -and I wish that I had. But I do think I had a right to be mad. My wife thinks you should never get mad at anyone, anytime, ever. I try to be polite and courteous when I can - but if someone is pushing for it - I can get verbal. Thoughts ? Tips for not letting idiots get under my skin / keep a cool head ?