A business plan can be used as a vehicle for accurate communication among principals, managers, staff, and outside sources of capital. It will also help to identify, isolate, and solve problems in your structure, operations, and/or finances. Along with these advantages, a business plan captures a view of the big picture, which makes a company better prepared to take advantage of opportunities for improvement and/or handle crises.
Sometimes it takes a significant event or change in existing conditions for a business to create a written plan. I think it's safe to say that the state of the economy is a significant change that should prompt business owners to alter the way they've been doing things. If you already have a business plan, it's time to get it out and revise it.
Personnel: The success of any company depends on their ability to recruit, train and retain quality employees. The amount of emphasis in your plan for this section will depend on the number and type of employees required.
You have to do research and you have to put your thought in to it. You have to follow a certain format that will put everything in perspective. Luckily enough, you can find business plans examples or even templates if you just know where to look.