Any business will benefit from having a Business Plan.
LB2: Business Plans covers information for fast growing, in a troubled state and a mature, steady state of the businesses life cycle.
A business plan will keep you focused on your chosen direction.
They can be complex but it is possible to structure a fairly straight forward plan that suits your business.
Learn about goal setting for your business. Metrics will allow you to track your progress against your goals.
Understand the implications of the 80/20 Rule and how to use this to benefit your business.
LB2: Business Plans has links to further references and articles within 12Faces.