In this lecture, Nico Wettmann presents insights into the Quantified Self and biohacking community with a focus on sleep. It is shown that the technological exploration and shaping of sleep does not lead to a devaluation and reduction of the passive and inactive time of life, but rather to a valorization of sleep. Self-trackers use digital media technologies to conduct self-experiments in order to acquire knowledge – always in the search for a good night's sleep.