When I was in college there were certain games I would turn to if I was struggling with a project, I'd had a bad day at my part time job, or whatever. To relieve stress I would come home and play Warning Forever or Parsec 47 (mostly the latter). A solid session with those games and I would emerge a relaxed and decisive individual.
Nowadays I find that my go-to game for that is Spelunky ... whether there's something in my life that needs consideration, or if I just don't want to feel weird sitting on my couch doing nothing but listening to the Bombcast with the lights off ... it's one of those games I can zone out of, and yet by being zoned out I play better than I ever could if I was trying my best. Like tonight - I started listening to the Bombcast and thought, "Hey why not try and get the last shortcut from Tunnel Man?" and I managed to do it while barely paying attention to the game.