1. Literally, anything from my library. If I'm alone, it'll be whatever I'm into at the moment. Right now, it'd probably be CHVRCHES, Japandroid's Celebration Rock, Alt-J, Jason Anderson, Girl Talk, Andrew Jackson Jihad, Ghost Mice, and the Mountain Goats. 2. Presently, I'd say something by Trouble Lights. Probably Hunting, but maybe Safe with Me, or Truu Love. Pretty good lesser known band, quite danceable. 3. Something calm, slow, and soothing, and nothing particularly electronic. I'd probably choose Godspeed You! Black Emperor's f#a#8, Boards of Canada's Music has the Right to Children or Geogaddi, but maybe The Campfire Headphase. 4. Well, if I'm just trying to stay awake, I'd probably go with something loud and fast-paced. Sleigh Bells' album Treats rarely steers me wrong, and recently Factory Floor's album Factory Floor has been filling that niche as well.