ok, then in that case i say keep it simple as possible. if you are writing it for yourself, then you are an educated audience so there is no need for a lot of fluff.
i don't think it is easy (or wise) to write a detailed business plan, put it on the shelf, and just simply update it in a few months/years. at least in my experience it does not work that way, things change, the company grows (or shrinks), the market changes, the opportunites and threats change. times change.
if you want yet another outline for a complete business plan:
Summary
Business concept
Current situation
Key success factors
Financial situation/needs
Vision
Vision statement
Milestones
Market analysis
The overall market
Changes in the market
Market segments
Target market and customers
Customer characteristics
Customer needs
Customer buying decisions
Competitive analysis
Industry overview
Nature of competition
Changes in the industry
Primary competitors
Competitive products/services
Opportunities
Threats and risks
Strategy
Key competitive capabilities
Key competitive weaknesses
Strategy
Implementing strategy
Products/services
Product/service description
Positioning of products/services
Competitive evaluation of products/services
Future products/services
Marketing and sales
Marketing strategy
Sales tactics
Advertising
Promotions/incentives
Publicity
Trade shows
Operations
Key personnel
Organizational structure
Human resources plan
Product/service delivery
Customer service/support
Facilities
Creating the financials of the business plan
Assumptions and comments
Starting balance sheet
Profit-and-loss projection
Cash flow projection
Balance sheet projection
Ratios and analyses
have fun, keep it simple: what are your goals in the coming period, how will you measure them, why are you writing a plan (and make sure this is answered in the plan you write). no more than 2 a4 sheets.