I don't have it down perfectly and still get depressed but for me it's combo 1. good sleep hygiene 2. eating healthy and regularly 3.exercise at least a few times a week 4. get out in nature for stress reduction 5. light therapy 6. working on cognitive distortions/mindfulness to not cycle into the episode further 7. healthy amounts of socializing and also time to myself 8. limiting stress (not always possible). 9. limiting sugar and caffeine intake (have been unsuccessful lately) 10. acupuncture also seems to help (haven't been able to afford recently).