This article is an overview of international tendencies on current mental healthcare transformation. It describes best practices based models and strategies aimed at improving efficiency of mental healthcare systems. To illustrate reforms in Quebec and France, the article reviews current literature and ongoing research on mental health care and service organization. During the last decade, primary care reinforcement, including best-practices and service integration, has been at the core of the mental healthcare system transformation. However, challenges regarding implementation appear to undermine the transformation's success. This article discusses mental healthcare services planning in order to improve their efficiency and allow the transfer of knowledge acquired through these reforms.