In the Social, Behavioral, Medical and Life Sciences we observe unpreceded possibilities of collecting a wealth of complex and intense longitudinal data, spurred by technical advancements. To optimally exploit the information contained within these data, methodological advancements are key. My ambition is to develop new, and expand existing, methodologies to extract the wealth of information contained within these complex datasets. By both developing and implementing novel methodologies in accessible, opens source, software I want to create impact with a broad range of researchers, fitting the need of a wide-spread audience. By creating the possibility to answer a whole new set of research questions, these novel tools will advance the research community as a whole.