I've been taking St. John's Wort for a couple weeks now (I have Type 3 ADD, or a hybrid form of ADD), and the difference is amazing. I can sleep (I fall asleep when I want to, including naps, and sleep all the way through the night, heavier than before), I even dream (and have pleasant and goofy dreams!) which before I only did rarely, but most importantly for me, anxiety doesn't grip me on a daily basis. I enjoy things, I don't feel trapped, etc. etc. etc. It's great.

I've also started taking N-Acetyl L-Tyrosine. This supplement is intended to increase dopamine and norepinephrine availability (if I understand it correctly). It's meant to treat the inattentive portion of ADD.