This is the first article I've read that attaches symptoms to the particular neurotransmitter it affects. If you can tell which neurotransmitter is deficient -- serotonin, dopamine, GABA, or norepinephrine -- you can find the right medication, or combination of medications to help.

Excellent resource that explains what neurotransmitters are and how they impact your emotional state. Provides a quiz that breaks down into 6 categories the possible type(s) of depressive disorder(s) you might be experiencing, and explains which neurotransmitters are likely responsible.

Wow! I loved this one! Not only did I learn a few things, but was introduced to products I never dreamed existed! I wish the test didn't require pen and paper, but that would be my only complaint. I highly recommend this page.