Kill Them With Kindness

There are some people in the world that are just hit with the mean stick. They are just unhappy and don't care about showing it.
I have gotten to know a lot about people working in restaurants and there are some people that just aren't fun to wait on. The unhappy ones are the worst. They have the most complex, specific orders, want them right away, and ask you for something new every time they see you facing them. They are the worst type of customer to piss off. They are the kind that go straight to the manager when you bring them flour tortillas instead of corn.
The best way to handle these people is with over the top, over exaggerated kindness. When they sit at the table searching for something to ream you about, you just smile and bring them extra of everything before they can ask for it. You find a way to put together their specific, detailed orders and you bring them two drinks instead of one, just incase. You have to stay really focused and attentive. When they realize they have nothing to complain about, it's like you won. They almost back down and give in. It is the best feeling ever.