I was reading the Rodale website for recipes and I happened upon their remedies section. They have some sensible depression remedies.
http://remedies.rodale.com/depression-remedies
I personally like the one, “Make Someone’s Day“. I try and make a friendly, uplifting comment to someone every day.
Perhaps you are lacking sleep (“Get some zzz’s“). Maybe you just need to make some space with their “Get Outside” suggestion. Perhaps you are B-vitamin deficient.
Try one different suggestion each day for 10 days and see how you feel.