So you've come up with a great idea. Or perhaps you've seen a guy from Swaziland that had made a bazillion dollars doing something that hasn't hit your town yet. 

You talk to friends. You do the math. You've finally found it, that one great idea that will mean you 'make it'. Just like the guys on the front cover of Fast Company, or entrepreneur magazine. 

Is a myth.

What you need is a customer.