1. Play lots and lots of Echo Bazaar, an online RPG set in Victorian-London-that-has-been-dragged-into-a-cavern-beneath-the-Earth.
  2. Enlist your friends’ help to prevent two visiting Russian women from becoming victims of human trafficking in New York City.

The first option is absolutely engrossing, if it’s the sort of thing you find engrossing, and can be done solo. The second option is… well, just read the link. A member of the MetaFilter message board posts a cry for help; over the next 24 hours, friends, acquaintances, and total strangers rally to keep two women from vanishing into god-knows-what. Astonishing, inspiring reading, and I only found out about it after the dust settled. I can’t imagine what it must have been like as a MeFi reader caught up in events as they unfolded. It makes you wonder how many stories end differently right here in New York every week because the victims don’t have a squad of internet people looking out for them.