Ah, Carnegie. Yep, read him a long time ago. I read through all that Positive Thinking stuff, and you know what, as goofy as it all is, it actually freakin' works.
But it takes a lot of concentration and work, and, as Woody Allen once said about relationships, "There's no way I could keep up that level of charm." LOL
I use that stuff at auditions, or if I'm running a show or helming a project and need to be a leader. It's like self brainwashing. But in a good way.