Confession: For 840 Days, I Had No Business Plan
http://coreyhoffstein.com/2011/03/17/confession-for-840-days-i-had-no-business-plan/tl;dr: My business is a little over 3 years old and I didn't have a solid business plan until a few months ago. The take aways? "Don't develop a product you think other people need, develop a product you need" and "grow organically and throw away your business plan frequently."