Neuroscientist Stephen Larson wanted to make OpenWorm, the world's first open-source digital organism, available for Web browsers. So he and a small team of scientists turned to crowdfunding. With four days left in a 30-day funding window, things looked grim: The project was only halfway to its $120,000 goal, and falling short would mean getting no money at all. The team rallied supporters, obtaining more than a pledge per minute in the campaign's final hours. Below, three lessons to keep in mind for your own crowdfunding projects.