Pink Slime. The Boy Scouts of America. Trayvon Martin. Each of these news stories started with an online petition that led to real, tangible impact. Each represents the power that people and organizations have today to engage and motivate hundreds and thousands of supporters to take action. The internet, social networks and mobile technology provide an unprecedented opportunity to increase the efficiency and impact of the time proven model of collective action, but you still need a story. Learn lessons from Change.org about how to not only tell a good story, but how to tell the right story.