There are two main purposes to a business plan. One is to use it
as an operational guide in which to grow the new business. This is
not to be scoffed at by first time entrepreneurs. The dotcomers of
the early 90's should have used more plans and less seat of the
pants decision making. If you have a few moments (44 minutes) enjoy
this video "mockumenary" on the imaginary dotcom business,
"Esoda."