" The 140-Character Mission Statement Let’s break down the planning process into a very simple exercise: defining the mission statement for your business (or your business idea) in 140 characters or less. That is the maximum amount of text for an update on Twitter and a good natural limit for narrowing down a concept. "

― Chris Guillebeau , The $100 Startup: Reinvent the Way You Make a Living, Do What You Love, and Create a New Future