1.Return money that you have been borrowed even before they ask for it,it shows your integrity

2.Never order for an expensive dish on the menu when someone is giving you a lunch/dinner.

3.do not ask awkward questions like
*Oh!,so you don't have kids?
* Why don't you buy or build a house?
* Why don't you buy a car?
They aren't your problems

4.If you take a taxi with your friend and he or she pays now,try pay next time

5.Respect different shades of opinion, remember, what is 6 to you will appear 9 to someone facing you.

6. Never interrupt people talking, allow them to pour it all out,hear it all and filter them all.

7. Praise publicly and criticize privately.

8.Never give advise until you are asked.

9. Mind your business, unless anything involves you directly, just stay out of it.

10. Never talk about your riches in the midst of the poor, don't talk about your children in the midst of the barren, don't talk about your education in the midst of illiterates.

If you obey principles you will become a principal

Never overkill your respect by begging a rich friend who never understands you are in need but a pest.