psychotherapy:

Andrew Solomon: When I began researching depression, I was a real medical conservative. I thought it was all about the meds. But now I believe that there are multiple elements involved.

For me, the medications are essential; I’ve tried going off them over and over, and I feel fine for a little while, and then I begin to come unraveled again. So I no longer make those rash experiments. I also see a therapist once a week for a 90-minute session, and I find that very stabilizing. Sometimes it feels like a little bit of a nuisance, but I know there is a trained professional keeping an eye on my mental health. My therapist can give me advice or steer me in directions that help me avoid catastrophe.

I also try to lead a fairly well-regulated life. Sleep is my great indulgence, and I get eight hours every night. Being chronically overtired raises stress levels in a bad way and is responsible for a lot of depressive breaks. I am not by nature strongly drawn to exercise, but I make sure that I work out at least three times a week, because studies have shown that regular exercise can be as effective as medication in bringing people out of a depressive state and in keeping them out of it. I also limit my alcohol intake (alcohol is a depressant). I avoid caffeine, and I am careful about diet.

Most of all, I try to keep my life in balance. I attempt to be among people who can countenance my occasional lapses. The secure knowledge that they are there can prevent those very lapses from taking place. And when I feel as though I’m getting super-stressed, I pull back. If I have another breakdown, it’s not going to be useful to anyone.

(Source)

I find it to be very difficult to be friends with people who do not & have not suffered from depression. I miss the friendship where I could not only be open about it, but they understood my feelings exactly.