This document introduces jooik, a personal activity guide that shows users cool things to do. It addresses the problem of "activity cluelessness" where people know they should be more active but don't know what to do. Jooik allows users to shape their profile and then provides recommendations of activities based on their interests. It highlights some key features of jooik including great documentation, community, Java integration, a lean data model, and Spring integration. The power of jooik comes from algorithms and social interaction.