The analysis of human life can as well form the beginning of human-technology interaction design as technological considerations. In this paper, we present a design paradigm called life-based design. Its basic concept and tool is the form of life (FoL). Forms of life are combinations of rule-following actions (RFA:s) with such attributes as biological, psychological and socio-cultural facts and values that people follow. The crucial innovative step in life-based design is the transformation of the rule-following actions into technology-supported actions (TSA:s). Life-based design thus presents a way to ground technology development on the investigation of life. Indeed, this is logical as technology is always for life and only for life.