Before you listen to the book, have an open mind - do not doubt yourself in advance. Remember, the very first thing you need in this field is confidence, then you need some expertise on the subject. But confidence is what can make or break you. Looking back at my own life, I never thought I could be a marketing consultant; I don't have the education nor do I have the skills for it. But he taught me it is not the education that makes you a great consultant.