A brief account of how the company began- You should mention in your business plan the history behind the formation of you company and the background of the founders and directors.
Management by objectives (MBO) is a process of agreeing upon objectives (as can be detailed within business plans) within an organization so that management and employees agree to the objectives and understand what they are in the organization.
A business plan should be detailed. In listing your products and services for example, you should not really stop by just enumerating them. You also should write down the descriptions and scope of your products and services, touch base on production and identify means on how you can market your "brain - child" to your targeted niche.
Plan of Operations : Think of this as how you are going to spend a day at your business. How will work get done, from taking orders through to delivery? This can really help you to understand how your business will work and any potential problems or room for improvements.