Ask HN: My brain refuses to think, what should I do?
Marijuana + Exercise.Seriously.I was having exactly the same issues recently, mostly the result of burning out in a giant flame from my last gig.  MJ and getting off my mildly chubby ass were huge boons to productivity.YMMV, but it's worth a shot.  I'd go for something a long the lines of Sour Diesel or BC Blueberry are strains I've found to really increase concentration and focus without making one lazy or sleepy.