A helpful collection of stories about the use of drugs that help you get things done. This amused me:
Individuals who experiment with these substances are on their own, testing drugs on themselves in a wild, crowdsourced, ad hoc brain-enhancement experiment. They join a scientific tradition of self-experimentation that stretches back to Santorio Santorio, a 16th-century physiologist.
If you experiment with mood-altering drugs, you join an older tradition.