I've found that, particularly lately, it is hard for me to just relax and let my mind wander. The shower seems to be a place that forces me to do so. Standing under the warm, massaging, cascading water just puts me at ease. It seems like at least everyday my mind starts to wander and ideas just start to pour out.
Just a couple of days ago I started thinking about a couple of old ideas and they just kind of fell into place as the building blocks of a new, more cohesive game concept.
How do you guys reach your own places of "zen" to think?