What is a good way to write a business plan?

It might be a better approach to take a class at your local community or state college for writing a business plan. Be especially wary of websites and companies that offer to write the business plan for you, for a fee. Writing it yoursellf and fully understanding it is a necessary step you shouldn't skip, and if your idea is any good, those guys might steal it, or try to elbow in to your company.