As for motivational speakers... This one I have to toitally disagree with you. I'm not sure which ones you've attended but if you go to seminars by the BIG ones, like Anthony Robbins, you'll be blown away. In fact, contrary to your views, I think these people are very much more practical. In that, what they say can be easily understood and put into practice. It's not easy to stand in front of a crowd and sound convincing. Try it.
These people are not there for show or bulls***. They've experienced life's downs and came back successful with methods that work. Not academic theories.