I have a friend who eats ZMA pills and say they work. I'm wary of that stuff, though. Also, my mum's a chemist (she has a doctorate in non-organic chemistry), and we both get annoyed at things like "All-Natural Chemical-Free Soap!" and peopel who use the word "chemical" as if it was something bad. Water is a chemical, people. Wake up!
Anyway, I simply live on coffee, junk food, anxiety-induced sleep loss and the occasional gym visit for mental effects (lifting weights makes me feel like a big strong man, regardless of how shrimpy I actually am). I'm more of a boy than a man, though.