Kratom. Never had it myself but I heard it's like weed that makes you productive. Then again I never had weed either so I can't guess what it feels like but extra productivity and motivation never hurts. Especially since weed apparently makes some people paranoid which kratom doesn't do.
Although methamphetamine is simply amphetamine salts with something that allows it to be taken in larger doses without killing you. If I took the amount meth heads take of meth but with my Adderall instead of getting high I'd die.
Why is the rum gone?
http://www.funraniumlabs.com/the-black-blood-of-the-earth/