It's easier for stressful things to stick in the mind; they're big and heavy and important, but what about all the good stuff? You know you've smiled in the last week - but can you remember what at?
If you note down all the things that make you happy from day to day, you can build up a list of escape plans for the next time you feel trapped in a bad mood.
And who knows, maybe brushing your teeth makes you ecstatically happy and you just never noticed.
Photo by Manny Valdes