If you already have an established vision and mission for your organization, look at it with fresh eyes. If necessary, spend no more than half an hour reworking it with a small group in your organization. This will get the juices flowing and set the tone for putting concrete plans in place. There are a variety of methodologies for each stage. Again, I'll describe those that work for me and hopefully for you, too.
Process is critical, but only if it leads to meaningful action.