Three things helped me, and I have a certain vulnerability to depression.
Exercise. Research has shown that 20 mins of exercise (where your heart rate is at least what you experience with a fast walk) about every other day (or more) helps reduce depression.
I take St. Johns Wart (a food supplement available over the counter) daily. Sam-e (also found over the counter) has also been shown to have antidepressant effects. Even though these can be found without prescription, it's best to consult your physician about them.
Last, but not least, I found that AA helped quite a bit.
Nice username BTW. All the best to you.