Have a happy default thought.

Sometimes you can just feel sad. Or angry. Or you whine.
You can stay there if you want. Or you can choose something else. I have a default happy thought. It's really an image in my mind's eye. I see my dog, Felix, running around in figure eights around some bushes in the backyard. He is so joyful! That thought carries me up or forward into feeling just a liitle better and then my mood spirals upwards from there.