When you write a business plan, it can serve as a blueprint for developing and growing your business. Your business plan serves as a means of accountability to yourself for the business you seek to start. The goals you set in your business plan, along with the steps and timeframe you map out for reaching those goals, will be your prime motivator for success. When you've written your business plan well, it can help you reach your goals more effectively and efficiently. You can also use your business plan as a way to attract investors. Lenders are more likely to fund your business if you're able to show them a workable plan.