Really nice answers in here.
Training tends to be my relaxing time, when nothing else matters other then the challenge in front of me.
Though I'll be more specific, my morning runs. I usually run the same path through my town every morning, and it tends to be my thinking time. After the first little bit it becomes a rather relaxing activity even when going hard, and I find it to be the time when I can pray, and calmly think about whatever is troubling me.
After my run, there is a church nearby I tend to sit at. Out the front are several stone benches with a fountain in the middle, I sometimes just sit there after my run and look at the water (Yes.. Water again). I lose track of time, sometimes I've been there for a few hours. Either way, its why I enjoy my runs so much, it ends up being the time I'm most at peace, and able to think about whatever.