From an interview with Gretchen Rubin of the Happiness Project:
Gretchen: What’s a simple activity that consistently makes you happier?
Josh: Riding my bike. It doesn’t matter where I’m going. Just so long as I’m pedaling.
What’s something you know now about happiness that you didn’t know when you were 18 years old?
I keep the Jewish Sabbath, which is not something I did when I was 18. For 25 hours each week, everything gets turned off. No email. No phone. I don’t make anything. I don’t destroy anything. No matter how much stress I have in my life, it all evaporates on Friday night.