No 1 don’t call someone more than twice continuesly if they don’t pick up your calls presume that they have something important to attend to:
No 2 Return money that you have borrowed even before the person that borrowed you remember or ask for it. ‘it shows your integrity and character.same goes with umbrellas,pens, lunch boxes.
Never order the expensive dish on the menu when someone is giving you a lunch or dinner.
After reading a good message try to say thanks for the message.
Never give an advice unless you’re asked to.
Mind your business unless anything involves you directly.just stay out of it.
Say thank you when someone is helping you.