If you google how to write a mission statement more than 300,000 results pop up. Each one of those articles contain different advice on how to write a great company vision statement.
Really, a vision statement should only have one purpose; inspire others to want to be a part of whatever it is you are building.
A strong vision statement should make others feel like you are building a cathedral, and not simply laying stones.
Before you begin to read one of the 300,000 articles out there about how to write your vision statement start by answering one question. What cathedra are you trying to build? Once you figure that out, I promise, everything else will fall into place…just as it should.