Incidentally, the idea of working with a business plan is for one to keep focus on his set goals. Statistics has it that many businesses fail due to inadequate planning. If one doesn't know where he's heading to, any route seems to be the right one. Most people make great mistakes by jumping into business without adequate preparation and planning. A good business plan helps one maintain focus on his goals and execute the strategies that the plan assisted him in creating. Just like a road, one's business plan has to be consulted to make maintain his focus and not running business in a layman's way.
If you do have a SBA resource center in your area, check their calendar of events to see if they offer periodic classes or workshops, or can help you rework a sample business plan. Often, an SBA will offer a class dedicated to writing a plan - at no cost! The advantage of attending a live seminar as opposed to an online seminar is that you can often ask the facilitator questions at the end which you can't do online. Typically, the person leading the course is a professional with years or decades of business experience. They'll likely be able to assist you with tips, tricks, and shortcuts to develop a plan.