Cover all bases. Before embarking on your plan it is a good idea to undertake some research in to what a professional business plan should include. You can then use this as a check list to make sure you have covered all the relevant areas. Sections of the business plan should include information on the company, the product/service market, competition in the field, management team, marketing strategy, operations and financials.
Traditionally business plans have been highly confidential and quite limited in audience. The business plan itself is generally regarded as secret. An open business plan is a business plan with unlimited audience. The business plan is typically web published and made available to all. In the free software and open source business model, trade secrets, copyright and patents can no longer be used as effective locking mechanisms to provide sustainable advantages to a particular business and therefore a secret business plan is less relevant in those models.
Financial Projections : If you are planning on borrowing money then this is a very important section. If you are already in business and have a track record of earnings you can include that here. You can then extend out to the future based on your previous growth. The key to a successful business plan is to include all of the information that is pertinent but no extraneous information. It should be clear and to the point so that even someone who is not familiar with the woodworking industry can follow it. If you want to learn everything you need to know about starting your own Six Figure Woodworking Business pickup your free "Start Your Own Woodworking Business".
It should include a market research that identifies your competitors, their share of the market and the range of the products they produce. By learning how they conduct their operations, you may learn tricks of the trade in the business you want to enter and you also get to have a basis on what you can do to excel.