BW Online has a great article called "The Napkin Test". The author believes that companies put too much effort into a wordy and quickly-forgotten mission statement. Instead, he suggests that companies focus on writing a powerful vision. The vision is different from the mission statement because it is concise and easy to remember. It should be 10 words or less, essentially short enough to write on the back of a napkin. (A little cocktail napkin, that is. If you can fit it on one of those huge linen napkins, then you're missing the point.)
When you're ready to sit down and write your vision, read this article first. Then you'll be ready to inspire your employees and customers!