This document discusses how engaged e-patients can help improve healthcare. It describes the journey of "e-Patient Dave" from being diagnosed with stage IV kidney cancer in 2007 to becoming a full-time advocate for engaged patients and participatory medicine. It outlines how e-patients conduct their own research, connect with online communities, track their own health data, and share information - all of which allows them to become better informed and make more collaborative decisions with providers. The document argues that e-patients are a valuable healthcare resource and that the future of healthcare will be more patient-centered when it engages and empowers patients.