I don't know where i read it.. but these are great ..
1.Be the most positive person
2.Be Candid and speak truthfully
3.Be on time
4.Say please and thank you
5.Under-promise and over-deliver
6.Leave people better than you found them
7.Be friendly and caring
8.Be a world-calss trainer
9.Become passionately interesdted in other people
And last not the least.
10. Smile a lot.. :)