Sadly, for a true depression there never really is anything I can do to snap out of it. Time and medication alone have that power. If it’s just a mild case of the blues, I may indulge in a day of weepy, poor me behaviour, resolving that tomorrow will be better. The next day, the single biggest thing I can do to lift my mood is open all the shades. Sunlight streaming in just makes me feel better some how. I make a point of being at least mildly productive, too.