If sophisticated calculations are needed to justify an action, don't do it.
No decision in business provides greater potential for the creation of wealth (or its destruction, come to think of it) than the choice of which innovation to back.
The easiest way of making money is to stop losing it.
Either an executive can do his job or he can't.
Without the right attitude, a business with everything going for it will fail.
Never ignore a gut feeling, but never believe that it's enough.