A health guidance system receives health information from input devices and other sources, tracks one or more health goals, and enforces those goals by acting upon other devices. The health guidance system collects health information to paint a comprehensive picture of the user's health. The system uses the information it collects to interact with a variety of devices to enforce the user's health goals and ensure accountability. Thus, the health guidance system provides a comprehensive software system for collecting health information and using that information to produce positive changes in the health of users.