Updating my business plan…

I’ve been in business 15 years as an independent consultant (or freelancer). Even though I don’t employ anyone, so you’d think I might not need a business plan, I find it helpful to update my business plan every few years. Usually it just seems like the right time to do some planning, almost like there’s a cycle to it. The last one I wrote was in 2006, and I’m guessing the next one will be in 2012, as it seems to be every 3 years.

I wonder, how often do other IC’s write up a business plan? Does it flex with your life goals and interests, or is it driven more by changes in the business environment?