- Out in the world!
According to a 2004 study published in Science, commuting is associated with fewer positive emotions than any other common daily activity. And yet, for those of us who commute on our bikes or by transit we have so many opportunities to interact with strangers.
This article talks about a number of studies showing that while our instincts might be to avoid talking to, or even looking at strangers, doing so makes us feel better. I can vouch for that - almost all of my interactions with strangers have left me feeling good for some time afterward.