So, although a detailed business plan may not be required for an online business, I am going to include it here so you can at least look at and consider each section and determine yourself if it applies to your business.
Studying your market will give you insight as to how you can make your business more appealing to people. Market research is more than just noticing trends in your customers' buying habits; it's discovering what motivates your customer to buy. Don't assume that you already know because you've been in this business for years. This study often unearths characteristics about your market that are hidden or new. It's best to discover these things before your competition.
A recession is the optimal time to reinvent competitive advantage because the pressure of a feeble economy will separate the strong businesses from the weak ones, with the weak falling out of the game entirely. Your business will be strong if you have a plan of action based upon a little industry research, an analysis of what you have and what you want, and continuous monitoring of the results of your plan. This kind of innovation is not only a necessity right now, but it is an opportunity to improve the quality and efficiency in the way you do business.
It may not be pleasant to imagine all the "what ifs," but doing it now and planning for those unexpected events will improve your company's chances of surviving a storm. For an excellent step_by_step guide on the details of developing a risk management plan, see the article "How to Develop a Risk Management Plan," by Charles Tremper at wikiHow.com.