Everybody starts a business with a plan. Whether its a ten-page bulleted-and-fact-checked document, or a scrawl on a sales receipt, you aren't going to leap into the chasm of entrepreneurship without at least an idea of what you plan on doing.

But do successful entrepreneurs follow a bit-by-bit plan, like a chemist in a lab, or do they "go with the flow," trusting their instincts to lead them…