I can report that the Great Energy Drink Time Trials are well underway as I plow through the last (oh, please God, let it be the last) lap or so of GURPS Infinite Worlds. So far, the winner by a clear margin is the one and only Red Bull, which is good for about another six hours of productive work. This is about the same as for good strong coffee, but I don't have to remember to make it, or ask
mollpeartree to make it, and hope that we still have milk, and et cetera. Also, the magic of Red Bull means that I simply crackle from the outside and fade rapidly as it wears off; the buzz from good coffee goes internal and makes me a jittery mess as it wears off.
If I survive this manuscript, I may post about Lessons Learned, and why the Grad School Model of game book writing is now officially Dead To Me.