Our brains can be very sophisticated but are also easy to fool. Let me tell you a little trick of mine. I use yellow glasses (lens!) in cloudy sad days. I leave the house, the day is kinda gray, I get in the car and grab my yellow glasses. All of a sudden everything is bright and happy again. Even knowing it's a dumb trick, the mood changes. To be completely honest... it may look like the Mad Max universe which is not that happy, but you know what I mean!
RMach