Longitudinal panel methods are particularly suited to studying the life course as a process. They make it possible to compare different moments in time, to analyze the intervals and to identify "ways of moving". Such an approach reveals turning points and helps to identify the relevant objective and subjective elements and driving forces that help to shape life transitions. These elements and rhythms are embedded in diverse life spheres, networks and social frames. The ways in which they interact, evolve and synchronize with each other are particularly crucial for young people. Based upon a longitudinal panel survey of young French people, this methodological discussion provides an original insight into processes of socialization.