MeHab is a smartphone service designed to help young adults reduce the frequency of their drinking. Users are asked to nominate and track three dry days a week. Initial testing has shown that this approach helps 65%+ of users to achieve a three days dry streak where they previously didn't. Outcome of the Session: -Audience will leave with an overview of the process and tools needed to develop new services. -They may even decide to take three dry days a week!