The first thing you learn with most jobs that require interacting with customers is that "the customer is always right." Even when they are blatantly wrong or incredibly rude, you must do everything in your power to make sure that they are happy.

So, you suck it up, learn to master the fake smile and continue to help the numerous annoying customers out there. Sometimes you get lucky and get angels for customers, and sometimes you get jerks straight from the pits of hell. Whether you are a waitress, in retail, a salesperson, an usher, etc., there are some things every person dealing with customers understands.

1. Having to deal with entitled, snobby people who think they are more important than every other customer.

2. When people ask to see your manager.

3. Having to talk to customers when they clearly don't want to be bothered.

4. When customers try to talk to you right when you're supposed to take your break.

5. When a customer freaks out over a minor thing.

6. When you tell a customer something and they completely disregard what you said; even doing the opposite in some cases.

7. When your back starts to give out after standing for hours on end.

8. When someone complains about you for actually doing your job and enforcing your company's policies.

9. When you put your heart and soul into a customer's requests and he/she doesn't leave a tip.

10. When the customer treats you like trash.

11. People are always so eager to complain, but never take the time to compliment you if you do a great job.

12. When you have to deliver bad news to a customer in regards to their requests.

13. When people are incapable of using their common sense to answer their own questions.

14. Something (usually technology related) will always go wrong when there is a huge influx of people you need to take care of.

15. You have to tell yourself that you enjoy your job and its perks just to get through the day.

16. You have definitely examined all of the life choices that made you choose a customer service job in the first place.

17. When you really, really, really want to talk back, but are forced to hold your tongue and push through so you don't get fired.

18. About half of your customers will annoy you, 40 percent you will be indifferent to and the other 10 percent make the job totally worth it and actually instill some hope for humanity.

19. But, at the end of the day, making a customer's day will probably make your day too.

Although it can be a real test of patience and perseverance, everyone should work a customer service job at one point to see what it is like on the "other side." It can really make you appreciate all of the crap people do to make sure you are happy wherever you go.