The choices we make about diet, environment, medications, or alternative therapies constitute a massive collection of "everyday experiments." These data remain largely unrecorded and are underutilized by traditional research institutions. Collective Discovery leverages the intuition and insight of patient communities to generate datasets about everyday experiments. We support the patient's process by simplifying tracking and assessment of lifestyle changes in their bodies and lives. This model is embodied in the free-for-the-public website Personal Experiments (http://personalexperiments.org) and is used to power a clinical "N-of-1" experiment platform called MyIBD at the Cincinnati Children's Hospital.