Don't be a rude fucking twat, when asked for your information. You are only asked so that you are not confused with another customer, not so we can stalk you.

When you're getting checked in, don't sit 10 feet away, speak in a voice barely above a whisper, and then get an attitude when you aren't heard correctly.

#2

If you walk into a place, and they say they have an hour wait, and they close in a half hour, don't ask to be put on the wait list. The people who are giving you whatever service that you're coming in for want to go home. Most of them have been there all day, and are tired and hungry.