A book I found to be quite helpful in improving the way my business runs is "The E-Myth". Lots of stuff useful for owners of all kinds of businesses.
Great advice here. I would add: Health codes, fire codes, building codes. Who to call when you have plumbing, electrical, heat issues. Service agents for coolers, dishwashers, ovens, all that stuff beyond coffee equipment you might not think as much about. Have a plan, time, and skills to be constantly tracking down vendors to keep your costs and quality where you need them.