Don't assume that they don't need it, and never make them ask you for it
4 Turn volume down if watching video,playing music or playing game on your phone in a public place or better, use headphones
Unplug the headsets from your ears even if nothing is playing & give them your undivided attention
6 When using someone else's phone or computer,don't go thru their stuff without permission
8 When someone else cooks for you, offer to help clean the kitchen
9 If you stay the night at someone's house, make the bed or fold the blankets when you leave
11 If you ask your friends for help with some house work, five then a small gift as appreciation feed them as payment
13 When you borrow someone's car, fill up the tank when you return it. If you've had it for a prolonged period of time, service it as a way of saying 'thank you.'
15 Don’t pick up a call while you are engaged in conversation without excusing yourself
16 Make sure you don't forget to return that book you borrowed
18 When someone gives you a gift, no matter how small it is or the way it was presented, even if it isn't up to your expectation, just say 'Thank You.'
21 When you have someone older than you who is friendly and makes himself free with you, speak to them with respect