1-Don’t contradict other,even if you know you are right.
2-Don’t be inquisitive about the affairs of even your most intimate friends.
3-Don’t underrate anything because you don’t possess it.
4-Don’t believe that everybody in the world is happier than you.
5-Don’t be rude to your inferiors in social position.
6-Don’t repeat gossip,even if it does interest a crowd.
7-Learn to hide your aches and pains under a pleasant smile.
8-Learn to attend to your own business.This is especially important.