"Has anyone come up with a motivation enhancer?"

Vyvanse (perscription-only ADD medication) is... almost unbelievably awesome for me there. I suspect it only works if your issue is somewhere in the range of ADD, though, as it doesn't do anything for my motivation if I'm depressed.

I've found that in general, "sustained release" options work a LOT better for motivation. Caffeine helps a tiny bit, but 8-hour sustained-release caffeine can help a lot. My motivation seems to really hate dealing with peaks and valleys throughout the day. Oddly, if I take Vyvanse one day, then skip it the next, my motivation completely crashes, but this doesn't seem to affect the value of Vyvanse for giving me very motivated days - it's the ups and downs within a day, not my long-term variation, that seems to disrupt motivation.