Mindfulness (not to be confused with meditation) is really helpful to me. I used to teach a meditative drawing technique called Zentangle. Your art experience is irrelevant. It's just a method to get you into a mindful state easier and faster. It help me which is why I began teaching it. There are studies on why mindfulness works.

When I am especially depressed I need to do tiny things. That's ok. A short walk outside daily will do wonders for example.