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Many actions have been undertaken worldwide to cope with climate change and to effectively reach the 2030 Agenda for Sustainable Development. Top-down approaches, based on both policies for the development of enabling technologies and incentives to promote their wide applications, have been largely adopted in most of the cases. However, the potential contribution of changes in individual behaviours still represents an underestimated field of improvement, despite many scholars have already evidenced their considerable expected impacts. This paper presents the first outcomes of a study on the role of citizens’ behavioural change in reducing GHG emissions, focussing on the functions and performed activities at household level. Starting from a review of the emerging body of literature on the topic, a map is drafted linking the people’s actions and choices and their most relevant effects on each of the environmental categories they can interact with. The mapping provides a list of suitable practices and lifestyles shifts to be adopted, organized by categories and weighted by their emission potential reduction on the whole households’ carbon footprint. This results in a sort of easy-to-read console allowing citizens to operate according to more informed decisions within their homes, thus accelerating the sustainable transition by bottom-up initiatives.