" PRINCIPLE 1 The only way to get the best of an argument is to avoid it. PRINCIPLE 2 Show respect for the other person’s opinions. Never say, “You’re wrong.” PRINCIPLE 3 If you are wrong, admit it quickly and emphatically. PRINCIPLE 4 Begin in a friendly way. PRINCIPLE 5 Get the other person saying “yes, yes” immediately. PRINCIPLE 6 Let the other person do a great deal of the talking. PRINCIPLE 7 Let the other person feel that the idea "

― Dale Carnegie , How to Win Friends and Influence People