I work in a restaurant. A REALLY busy place. The thing about restaurant work that I have noticed over the many years that I have been doing it is this: Don't piss anyone off untill they get their food. People who are hungry can be scary. If you make a mistake, fix it right away, but wait untill they have eaten something before talking to them anymore about it. They become much more reasonable after they have eaten. My point is, when dealing with the public, you will undoubtedly find those who cannot be reasoned with, but as you ease into the new business, you will find those little idiosyncracies about your particular field that will make most day to day dealings smooth as a baby's butt.