Extracted From Book Viz. , How to Win Friends and Influence People

Avoid arguments.
Show respect for the other person’s opinions. Never tell someone they are wrong.
If you’re wrong, admit it quickly and emphatically.
Begin in a friendly way.
Start with questions the other person will answer yes to.
Let the other person do the talking.
Let the other person feel the idea is his/hers.
Try honestly to see things from the other person’s point of view.
Sympathize with the other person.
Appeal to noble motives.
Dramatize your ideas.
Throw down a challenge.