A crash course in changing the world.
My favorite secret is :
Share knowledge and skills to continue the innovative process both to and from people and communities by Paul Polak.
I think this secret/rule describes very well the capability of social innovators.Humans are limited in their skills and knowledge and therefore it is impossible for them to effect something alone. However social innovators share their knowledge and skills in order to solve a problem or to swap ideas for a solution. Besides you will get more creative solutions and ideas, if you work together, because you will motivate by the others.