People are effective because they say 'no,' because they say, 'this isn't for me.'

Plans are worthless, but planning is invaluable.

[Entrepreneurship] is by no means hunch or gamble. But it also is not precisely science. Rather, it is judgment.

One cannot manage change. One can only be ahead of it.

I'm a writer. I could not or would not ever run a business. I don't even have a secretary. And contrary to some of the stereotypes, entrepreneurs are not loners. I am.

Teaching 23-year-olds in an MBA programme strikes me as largely a waste of time. They lack the background of experience. You can teach them skills - accounting and what have you - but you can't teach them management.

The real achiever do one thing at a time.