Developing a more sustainable way of life is one of the most urgent tasks facing our planet and its inhabitants. While the majority of people are now aware of such issues, such as climate change or biodiversity loss, too little is being done to translate this knowledge into concrete and sustainable action. To promote the necessary behavior changes, research is studying the determinants of sustainable behavior, and policymakers have started to apply behavioral knowledge to develop new intervention strategies. In this presentation, we will discuss the most recent psychological knowledge about the factors that can motivate people to take sustainable actions or that can hinder those actions. Different intervention strategies aimed at promoting sustainable action, such as information provision, motivational approaches and “nudges” will be presented and discussed.