Yeah, the book is impressive. It will teach you how to become likeable by most people, and that is something you definitely need if you want to become a manager or any kind of leader, or just if you have to deal with people on your job, even if it's just your boss and coworkers.

Its a really nice book. In fact, I am gonna read it again after seeing your comment!

For me that tipping point was when I came across this:

>The one book we encourage startup founders to read is Dale Carnegie's How to Win Friends and Influence People. It's critically important for anyone in business.

http://www.paulgraham.com/startupfaq.html

It's a valuable book, despite it's name. My tipping point was a Warren Buffett interview, where he mentioned how it influenced his early life.