at least half an hour a day on week days, where I usually ignore my non-cuber friends and time myself on cstimer. at least an hour on holidays and weekends, and up to 6 hours in one day sometimes... most of this is timed solves, though I might get inspired and learn something new or get bored and watch new cubing videos on Youtube. Also, much to the teachers dislike, I often cube in class, giving my classmates and teachers a bit disrupting noise