Risks

I recently met up with a friend who is owns a business. What startled me was the way he ran it. He promised a client he would be able to deliver his product in a few days although he did not have a supplier at that point. After promising his client, he then only proceeded to call his supplier to see if they would be able to meet this demand. Defies all my common sense but he's the one owning the business while my darn common sense is telling me all the risks I would take if I were to start my own.