After writing my article last week, I thought of a whole slew of "Dos And Don'ts" that I'd forgotten. I would be remiss not to include them in this saga, so I've decided to write a second installment to "Confessions Of A Teenage Retail Worker."

DON'T argue with me about prices.

I am just a cashier. I don't make the prices nor do I have the power to override them. The clearance sticker is not law. More often than not, that happens because someone has moved the clearance sticker from one item to another in an attempt to get it for a lower price. Just because someone stuck a $7 clearance sticker on your $89.99 pair of Nike sneakers doesn't mean that the sticker is correct. That one is just common sense.

DO take out your headphones.

I don't care if you've turned off whatever you're listening to, take the headphones out. It's just common courtesy. Also, be polite and hang up the phone. I can't even explain how obnoxious it is trying to ask you for your rewards card or tell you your total when you're yapping away on the phone.

DON'T drum on my counter.

I can only speak for myself, but it makes me super anxious. Even for people who don't have anxiety, it's incredibly annoying. I'm already listening to seven screaming children and ten beeping scanners — I don't need to hear your rendition of Van Halen's "Hot for Teacher."

DO say hello back to me.

If I say hello and ask you how you're doing, the socially acceptable thing to do is to respond back to me. Don't glare at me and give me the silent treatment.

DON'T complain to me about the length of the line.

This is especially true if there are only two cashiers on the clock. We can only check you out so fast, especially if you have price checks or a difficult return situation.

DO cooperate with me while I'm doing your return.

Trust me when I say that taking the cost of your return off the total of your purchase will make things easier for both of us. Accept the fact that I can only give you store credit when you're doing a return without a receipt.

DON'T insult me in another language because you think I can't understand you.

News flash: "Stupid" in French is "stupide". Not exactly subtle.

DO bring up items with barcodes on them.

If you don't do this, you lose the right to get upset with me over a.) the price and b.) the time it takes to do a price check. If you see the exact same item with a price tag on it, even if it's in a different size and you don't want it, save us both the price check and bring it to check out with you so I have a barcode to scan.

DON'T hover behind the customer in front of you.

It's just rude and it makes me feel claustrophobic. There's a queue for a reason — stay in it until someone calls for you.

DO check out in a timely manner.

If you have a huge purchase, don't get in line five minutes before close. Actually, just don't get in line five minutes before close, period. There's a reason we make announcements about when we're closing. Heed that fifteen-minute warning.

DON'T flirt with me.

It's less offputting if you're my age and I'm flirting back. But if you're three times my age, just leave me alone. Your prying questions about my schedule for the rest of the week, my age, and my relationship status are so beyond inappropriate.

DO learn how to use a PIN pad.

I understand that every store has a different system, but one thing is universal — THE OBNOXIOUS SCREECHING NOISE. Seriously, guys: That means take your card out of the chip reader! Nothing is more annoying than listening to that noise while you're on your phone or messing around with your wallet or bags. If you accidentally cancel the purchase, don't get on my case as if it's my fault. Accept responsibility and move on.

DON'T pay with a $100 bill when your purchase was $12.83.

Making change for that is obnoxious and, especially if it's first thing in the morning, I probably don't have change anyway.

You might think you're being obnoxious or being "that guy", but you will never understand how much I appreciate not having to make change for $100.

DON'T leave the items you've decided against around the queue.

Just hand them to me at the register. It makes my life so much easier. It gets old having to lug a cart full of discarded purchases around the queue.

DO pay attention to your surroundings.

Don't stand around texting or talking to your friends and ignore us when we say "Register Five is open!" Or, even worse, don't say "I know" when we tell you someone will help you down on Register Eight. If you know, if you've heard or seen our call, hop to it. We don't have all day.

DON'T get an attitude with me if I don't laugh enough at your dumb joke.

Yes, I will try to humor you even if I don't find it funny. But I have been here for eight hours and nothing is funny to me anymore.

DO laugh at my jokes.

See above.

DON'T scream at your kids in my line or at my register.

I understand the need to discipline them, but screaming is just unnecessary. You know what else is unnecessary? Hitting your kids in front of me.

DO use your rewards card.

Regardless of whether you're spending $1 or $100, I need to put your rewards card in the system. It's part of my job — we have a quota to reach to keep our managers and corporate office happy.

DON'T tell me how to do my job.

Not only are you not my boss, but I'd like to see you put up with customers like yourself all day. I know what I'm doing, and I do it well. I also deserve an award for putting up with "The Customer From Hell" (she's a story for another day, but she's a terror). Don't tell me that I'm bagging your items wrong or that I should've used your coupon even if you didn't spend enough money. I have a handle on things — I don't need you bossing me around.

Heed my advice! You'll be on every cashier's good side and, who knows, maybe they'll lend you that penny someday to avoid giving you $0.99.