If you’re in that kind of depression where everything is blurry and days blend into one another, taking a lot of photos of positive things might help. If your pet does something cute, you ate something good, got a high score, you cleaned your room, the weather was nice… I’m not saying this will fix your depression, it’s just a good reminder that you are in fact living regardless of the depression distorting your memory and making your past seem like fog of sadness and nothing else.