Dale Carnegie was good but if you just live by Philippians 2, you would have the same results.
Philip. 2:1-11 (MsgB)
If you’ve gotten anything at all out of following Christ, if his love has made any difference in your life, if being in a community of the Spirit means anything to you, if you have a heart, if you careâ€”  then do me a favor: Agree with each other, love each other, be deep-spirited friends.  Don’t push your way to the front; don’t sweet-talk your way to the top. Put yourself aside, and help others get ahead.  Don’t be obsessed with getting your own advantage. Forget yourselves long enough to lend a helping hand.
 Think of yourselves the way Christ Jesus thought of himself.  He had equal status with God but didn’t think so much of himself that he had to cling to the advantages of that status no matter what.  Not at all. When the time came, he set aside the privileges of deity and took on the status of a slave, became human!  Having become human, he stayed human. It was an incredibly humbling process. He didn’t claim special privileges. Instead, he lived a selfless, obedient life and then died a selfless, obedient deathâ€”and the worst kind of death at that: a crucifixion.
 Because of that obedience, God lifted him high and honored him far beyond anyone or anything, ever,  so that all created beings in heaven and on earthâ€”even those long ago dead and buriedâ€”will bow in worship before this Jesus Christ,  and call out in praise that he is the Master of all, to the glorious honor of God the Father.
Look how Carnegie says it:
How to Win Friends and Influence People
Fundamental Techniques in Handling People
- Donâ€™t criticize, condemn or complain.
- Give honest and sincere appreciation.
- Arouse in the other person an eager want.
Six Ways to Make People like You
- Become genuinely interested in other people.
- Remember that a personâ€™s name is to that person the sweetest and most important sound in any language.
- Be a good listener. Encourage others to talk about themselves.
- Talk in terms of the other personâ€™s interests.
- Make the other person feel important–and do it sincerely.
How to Win People to Your Way of Thinking
- The only way to get the best of an argument is to avoid it.
- Show respect for the other personâ€™s opinions. Never say, â€œYouâ€™re wrong.â€
- If you are wrong, admit it quickly and emphatically.
- Begin in a friendly way.
- Get the other person saying â€œyes, yesâ€ immediately.
- Let the other person do a great deal of the talking.