These Guidelines represent the first attempt to provide international recommendations on collecting, publishing, and analysing subjective well-being data. They provide guidance on collecting information on people's evaluations and experiences of life, as well as on collecting “eudaimonic” measures of psychological well-being. The Guidelines also outline why measures of subjective well-being are relevant for monitoring and policy making, and why national statistical agencies have a critical role to play in enhancing the usefulness of existing measures. They identify the best approaches for measuring, in a reliable and consistent way, the various dimensions of subjective well-being, and provide guidance for reporting on such measures. The Guidelines also include a number of prototype survey modules on subjective well-being that national and international agencies can use in their surveys.