Some types of depression cannot be overcome, but they can be managed. I've been chronically depressed for most of my life and I can tell you, it never completely goes away. It's always in the background waiting for a moment of weakness so it can bite you in the arse again.
How I cope:
I avoid negativity as much as I can
I prefer to laugh than scream these days, and can find humour in most crappy situations.
I take atleast 5 minutes a day to "stop and smell the roses". I don't always have roses around to smell but I take in the beauty of the sky, the grace in birds flying over head. Stopping to watch an animal do it's thing, often birds. I talk to the yappy maltese terrier named Brutus that doesn't like me as much as I like him.
It might not seem like much, but that 5 minutes a day is my favourite time, it's my sanity saver. I feel so light and happy. When I feel the crappest, I can bring myself back by reminding myself of those 5 minutes a day.
I am slowly removing the drama from my life too. Anyone that causes me more stress than it's worth, I ditch. I don't need it.
I have always been curious, so even at my darkest, I know I will get through it because I just have to know what's going to happen tomorrow. I wasn't always that good at that, but I had a turning point at 16 and since then the curiosity slightly outweighs the darkness. It's not my light at the end of the tunnel, it's my one star in the sky. It keeps me here.
Sorry if I've been too... I don't know. I've had a day full of bad moments, and of course a few good ones.
'People are never perfect but love can be. People waste time looking for the perfect lover rather than creating the perfect love' - Princess Leigh-Cheri from Still Life With Woodpecker.