A good business plan is used to attract funding from investors. Most investors will look at a business plan as a decision-making tool. There are certain things investors look out for in a business. These include one's management team, every investor will want to know a business owner's managerial skills, passion, and his dedication to his business. A comprehensive description of how one's products or services should be discharged, his customer base, his market and financial analysis. A business plan should have a realistic financial forecast. Every investor will always like to see his business associate's return of investment, cash-flow and break-even analysis. Hence, a well prepared business plan is the key to attracting investors.
You may find that the easiest part is the actual writing of the plan. The real work comes in the data-gathering, which may take you a hundred hours or more, depending on what you already know or have researched. If your new venture is in an area where you've been working, you may already know about your customers, your suppliers, your marketing plan, your organizational structure, your financial and cash flow needs, equipment, inventory, and so on. If you know all of these except for Marketing, say, then this is where you will need to invest some time and effort. You can find a wealth of information by utilizing the traditional data sources such as chambers of commerce, major cities' websites, trade associations, the US Census Bureau, trade journals, magazine and online articles and advertising, etc.