This paper presents a proposal of theoretical development with respect to the construct "Life Project" as an organized motivational structure and for this purpose the elaboration of a construct that involves the different stages within the life cycle of the human being organized around a Model is proposed of Tasks, so that the different tasks and their processing or elaboration (psychic work) in the different stages of the life cycle are evaluated and presented. The "Project of life" is a concept that is widely used in the different professions of aid and education, but in its conceptualization there is little literature and it has not been systematized in a very clear way, so that contributions are being made in this way. The models of tasks have been used in some conceptualizations of development and the exercise seeks to present a sustained and organized proposal that contributes to the field of human development. The proposal consolidates previous approaches prepared by the author, which have been selected from the analysis of some theories of evolutionary development as well as concepts of quality of life and well-being from different perspectives. The aim is to establish a conceptual development base that integrates the elements to enrich the field and facilitate research and analysis.