When you borrow someone’s car, return it with a full tank of gas, or at least fill it up more than what you got it as a way to saying thank you.
When someone shows you a picture on their phone, don’t swipe left or right . . . you don’t want to see something embarrassing.
Don’t break up with someone over text message, email or using a social networking site.
Always leave at least one buffer urinal between you and the sir next you. Never do this.
Be quiet when other people are asleep. That means more than not talking — not slamming doors, drawers, etc.
If you ask your friends for help with some house work, feed them as payment.
Chew with your mouth closed. No one needs to hear you crunching.
Don’t let your arguments escalate in public. If you feel you can’t control your language or volume then go somewhere else where to continue where other people won’t feel uncomfortable.
Always leave the last piece of something to the person who bought it, unless they really insist they won’t eat it.
In case you miss a call, drop a message as soon as possible if you’re unable to call them.
When you borrow money from a friend, pay them back as soon as possible. It doesn’t matter the amount, don’t assume they don’t need it, never make them ask you for it.
If you stay the night at someone’s house, make the bed before you leave, regardless if they plan to wash the blankets or not.
When someone else cooks for you, offer to help with the dishes.
If someone gives you space, or the right of way on the road, wave to them as a sign of thank you.
Don’t make plans with friends, or talk about plans with friends, in front of people who weren’t invited.
Don’t stop in the middle of a busy sidewalk or the entrance of a subway station.