The customer is not always right, in fact, they are usually wrong. On top of that, a customer is much more likely to voice a complaint than they are to offer praise. But how does the person serving you often feel about your interactions? Sometimes poor service is a direct result of a customer’s poor attitude. Sometimes, you just need to give a little to get a lot back.
For customer service, some manners can go a long way. Tipping decently at your “regular” spot might get you some extra attention and something as simple as not talking on your cell phone while paying for groceries will result in a more pleasant attitude from your clerk. There are a lot of people who work in the customer service industry and many of them would like you to know a thing or two about how to handle yourself and address them to make the overall experience that much more enjoyable for the both of you.