If you've seen some of the lectures of Reid Hoffman you'll immediately recognize him as one of them.
There is an old saying that one who know how to do things - does them, and the one who don't - teach how to do them. So be aware of all those professional speakers and presenters who are saying they could teach entrepreneurship. The real school is the actual world around. Go and try to be an entrepreneur! There are books and people who can assist in avoiding obvious mistakes... But very often you are still better off making your own.
