As someone who struggles with this on and off, probably more on than off but I dont like to admit that, I find gratitude to be the one thing that makes a huge difference in my life. It fits in nicely and deeply with my religion as well so there's that.

Externally though people think I'm a very happy person. Internally I know its just easy for me to forget or push away the dark thoughts for periods of time, but when I let them surface, they can cause a lot of sadness.

The thing about me is that I am a very logical person. I recognize and find it very easy to deal with the fact that depression is by and large a chemical imbalance. So I often find it very easy to label my current sadness as something caused by lack or excess of chemicals in my brain and that helps me cope a lot with things as well.

I've found depressed people tend to be told a lot to excercise and dont consider it as a solution, but again for me I find it fairly easy to co-relate the low points in my life with a lack of excercise and fresh air. So this tends to again help me push myself out of my low moods.