Integration of economic, social and environmental dimensions is key to achieving sustainable development. There is, in general, a widespread acceptance of why the integration of the three dimensions is necessary; however, questions arise as to how this integration is to be achieved. This publication has been produced to assist policymakers in addressing the question of how to achieve integration. Produced by ESCAP in collaboration with experts from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Integrated Sustainability Analysis group at the University of Sydney, this publication introduces useful concepts and practical tools to assist policymakers in promoting integration of the three dimensions of sustainable development across the policy cycle.