I came to the realization that my previous job cashiering taught me patience and something that is probably best described as zen.  Working at "well known American home improvement chain" involved a lot of waiting around for something to do, and even when I was doing something, I really wasn't doing anything.  All the assigned work consisted of tasks that in the near future will probably be left to robots and highly trained chimpanzee volunteers.  I wasn't supposed to do anything.  I wasn't allowed to leave my assigned work area and look for more work to do.  Attempting to make conversation with people would only yield reprimand. And so on.  Each day I would run out of things to do, and then, amazingly, I would run out of things to pretend to be doing.  At first I thought, this is great, I have all the time in the world to just think about whatever I want!  Somehow, though, after a number of months it seemed that my mind had exhausted itself.  I'd thought about my life, contemplated alien civilizations and pondered my coworker's hairstyles.  Most lines of thought ended in metaphysical analysis of my own personal despair at my crappy job, so it came to be that there was nothing much left to think about.  So I spent most of every day standing around not doing anything with my mind blank.  Nowadays when I have to wait in a line or if somebody is running late and I'm just standing around waiting for them, I don't get feel antsy and impatient.  I HAVE LEARNED TO JUST "BE."