In recent years there has been a growing interest in augmenting human cognition (attention, engagement, memory, learning, etc.) through ubiquitous technologies. With the ongoing research and development of near-constant capture devices, unlimited storage, and algorithms for retrieval, the resulting personal data has opened the door to a vast range of applications. In the third rendition of this workshop series, we focus on technologies and applications of capturing and integrating personal memory into everyday use cases. With the question What constitutes as a modern lifelog?, we would like to invite researchers, designers, and practitioners to envision and exchange ideas on how ubiquitous technologies and applications enhance people's memory in everyday life. In this one-day workshop, we will formulate application scenarios for making use of ubiquitous technologies in order to push personal data to an application layer where it is used to support and augment the human mind.