Sometimes I take a couple of hours on a weekend, too. Coffee shops are my favourite, but I'll sometimes just find somewhere secluded (usually a park or something). I'll sometimes read, sometimes write, sometimes just sit there and think, or imagine... I guess just letting my mind wander. I find it's really helpful to de-stress, and sometimes helps me to put problems in perspective, work out relationship issues, and all sorts of things.
How much time do you spend 'doing nothing' each week? What time, and where? What do you do? Any other thoughts or comments?