The document summarizes the top five takeaways from the Digital Health Extravaganza conference in 2013. The takeaways are: 1) Use social media purposefully by focusing on topics people care about. 2) Work on a small scale by engaging individuals. 3) Measure real-world outcomes rather than just usage data. 4) Design solutions that consider the full context or ecosystem people live in. 5) For mobile health solutions, have a focused design.