A practice is any activity, or collective set of activities, intended to improve outcomes for people with or at risk for substance abuse and/or mental illness. Such activities may include direct service provision, or they may be supportive activities, such as efforts to improve access to and retention in services, organizational efficiency or effectiveness, community readiness, collaboration among stakeholder groups, education, awareness, training, or any other activity that is designed to improve outcomes for people with or at risk for substance abuse or mental illness.