Pay people back before they have to ask you to.

Never ever make fun of someone who is overweight at the gym.

You having a bad day doesn't mean that you have to ruin other people's day.

When I show you a singular picture on my phone, don't ever try to swipe left or right.

Always let people out before walking in. This applies to elevators, trains, or anything similar.

Be the person your dog thinks you are.

If someone comes up to you that you don't know starts loudly talking about being your friend you play along

If you're wrong, admit it.

If someone is giving you a ride, be ready before the person arrives to pick you up.

Maintain personal hygiene regularly

Don't play your music out loud when in public. For example: While walking down the street or sitting on a bus one should not be blasting music on their personal device. Buy a pair of headphones.

Be patient with the elderly.

Don't wear white to a wedding, and don't propose at someone's wedding. I'm sure this isn't what some want to hear, but that is not your day. Don't be a d*ck.

Chew with your mouth closed.

Don't bother someone with headphones in unless it's important. They have headphones in for a reason.

If you borrow a friend's car, fill up the tank when returning it as a thank you.

We don't fight at weddings.

Don't [frigging] cheat on your SO. It's not cool. If you wanna sleep with someone else, break up with your SO first.Happens way too often.

For women: always have an extra pad or tampon on you. You never know when another woman might desperately need it. You may not like her, but this is your one exception to be nice. We've all been there.

Common sense ain't that common, so explain things in the simplest manner you possibly can.

Leave it better than you found it.

Never ask a woman if she's pregnant

After applying restraints to objects in the flatbed of a truck, saying "Yep, that's not goin' anywhere" is an absolute necessity.

If someone clearly doesn't want to talk to you or needs to be somewhere else, let them be.

If you're going to ask someone to help you move, please have all the boxes already packed and ready to go.

If a friend buys you a drink you don’t pay it back you just buy the next round

Don't make it a problem and it won't be one.

Cover your mouth when you cough with your elbow, not your hands that you will then touch a bunch of stuff with. Applies to sneezes as well. In general, just keep your gross bodily fluid to yourself unless clearly requested to share.

Do not, in any way, be that guy

Don't point out things about someone if they can't change it in the span of the next 5 minutes.