Spent the rest of the night writing up what I had read. Survey is looking waaaaay better than it did just 24 hours ago. Bailed on work at 3PM. If I make a habit of this, I'll probably quit work earlier than that and move my adviser meeting to Friday afternoon.
Worked through the night reading supervised learning papers. This worked really well. Yes, it's a grind, but it's a sure way to get a block of time. I may start working through Thursday nights on a regular basis.