It's easier to avoid falling asleep when wrenching on bikes than when sitting in a quiet (mostly) office. I've always suffered from post-meal doldrums and it seems as though that trend has not abated. I usually try to counteract that with caffeine, and since there's no coffee machine here, I had to make do with my patent Coffee Bean GORP. That's right, just chuck some coffee beans right into the trail mix and you have ready made, power up mix.