Talk about your own mistakes before criticizing the other person.

By fighting you never get enough, but by yielding you get more than you expected.

My popularity, my happiness and sense of worth depend to no small extent upon my skill in dealing with people.

If we are so contemptibly selfish that we can’t radiate a little happiness and pass on a bit of honest appreciation without trying to screw something out of the other person in return—if our souls are no bigger than sour crab apples, we shall meet with the failure we so richly deserve.

I once succumbed to the fad of fasting and went for six days and nights without eating. It wasn't difficult. I was less hungry at the end of the sixth day than I was at the end of the second. Yet I know, as you know, people who would think they had committed a crime if they let their families or employees go for six days without food; but they will let them go for six days, and six weeks, and sometimes sixty years without giving them the hearty appreciation that they crave almost as much as they crave food.

Praise the slightest improvement and praise every improvement. Be hearty in your approbation and lavish in your praise.

Once you have made a careful decision based on facts, go into action. Don't stop to reconsider. Don't begin to hesitate, worry, and retrace your steps. Don't lose yourself in self-doubting which begets other doubts. Don't keep looking back over your shoulder.