There is quite a lot of evidence that engaging in creative activities improves health — mental and physical. Writing, drawing, painting, making crafts or music, even doodling and colouring in — they can all help to focus our thoughts, increase our happiness, boost our immune systems and even help treat dementia.
I’ve experienced periods of depression for most of my adult life. Of all the treatments I’ve tried, what seems to work best is making stuff; focusing my mind and hands and energy on some creative project, however small. At the moment, it’s Christmas cards.
I’m always a bit reluctant to recommend anything, especially for something as serious as mental health, but there is a significant body of research behind this — and it works for me.