As mental illnesses are often a major cause and/or a factor of youth vulnerability, mental health support is becoming an increasingly important part of youth activation strategies. This section provides a review of integration strategies targeting vulnerable youth, and discusses integrated services effects’ on youth activation and mental well-being. Levels of integration vary, but the most intensively integrated systems offer multi-service agencies in a single location. These agencies offer assessments, planning (such as individual action plans), referrals, and associated social services (Taylor, 2010).