The Wall Street Journal just posted an extended article, actually the product of four interviews, with four start-up coaches. I won't try to echo their advice, just give you the link.
The relevance here, to this site, Selling Face-to-Face, is that a lot of readers of the blog, and of my how to sell guides, are people who are already engaged in, or considering undertaking, new business start-ups. Reinventing your career (voluntarily or involuntarily)? Considering self-employment? Got a new better mousetrap-- or better App-- you think (hope?) the market really, really needs? You'll find some savvy advice in this article.