The biggest mistake one makes when starting a business is when they do not address all possible constraints. Moreover, they move on with no future goals and plans. However, a true businessman realizes all the risks involved. No business is safe from loss. But with care and precaution, the loss can be minimized. As long as there is a clear understanding that minimum loss is profit for the company, there is no threat for failure.

I find that there are few key features to start a business:

(1) Vision: How far can I take this business to? Analysis of growth vs profits is important. Where do I see my company as in 5 yrs, 10 yrs, 15 yrs.. etc. Am I gong to have only one Subway or 10 Subway's?

(2) Passion: Will I enjoy the venture? Can I drive a car and will still be planning my next move while driving, instead of only listening to the news or music? Can I separate business from personal life and hobbies? Can I spend 24, 36, 48 hours without sleep if the business warrants?

(3) Risk vs Gain? Have I addressed all or most of all the constraints? What is the next plan if one fails? Am I a business person or a speculator? Remember: Speculation and assumptions are the worst moves and don't have a room in business.