Question 9: Are You A Self-Starter?

Entrepreneurs face lots of discouragement. Potential buyers don't return calls, business sours or you face repeated rejection. It takes willpower and an almost unwavering optimism to overcome these constant obstacles.

John Gartner, an assistant clinical-psychiatry professor at Johns Hopkins University and author of the book "The Hypomaniac Edge," theorizes that many well-known entrepreneurs have a temperament called hypomania. They're highly creative, energetic, impatient and very persistent -- traits that help them persevere even when others lose faith.

"One of the things about having this kind of confidence is they're kind of risk-blind because they don't think they could fail," Prof. Gartner says. And, he adds, "if they fail, they're not down for that long, and after a while they're energized by a whole new idea."

You don't have to be as driven as, say, Steve Jobs to succeed. But somebody who gets deterred easily, or too upset when things go wrong, won't last.