The first week of my sabbatical leave was already faboulous and so inspiring. Together with Eric Hekler and Pedja Klasnja I was organizing a Dagstuhl seminar on „Life-long health behavior change technologies.“. It was such a fruitful work in which all participants enjoyed the great interdisciplinary discussions. Thank you for joining this event and I am looking forward to meeting some of the participants over the summer. We will have many follow-up activities coming in the next months.