Exercise helps depression.
Yes, move to a latitude closer to the equator, warmer and longer daylight hours, especially during the winter months.
Ditto that. I walk the dog about four miles every day. And every day since I started...the world has gotten a little brighter and I have felt better.
It can be a chemical thing— so eat right, exercise, and do some thinking about what Direction you are going in. Sometimes your body will tell you when you are headed in a direction your soul doesn’t want to go.