Prayer, and brainstorming a list of simple baby steps towards progress and desired outcomes. Just seeing a plan, even if I don't have the capacity to do it at the moment, helps calm my mind.
I make sure everybody takes their medication! ?
Get the hell outside. Breathe. 
For me there is no substitute for rigorous exercise.
Ura/Sat/Nep in Cap 12th house stellium, neither of these planets conjunct my Ascendant, which means that it becomes more trying to ground all that energy. In order to achieve this, I spend a lot of time alone, but I do a lot of things, such as writing or physically connecting with my nature, such dancing. And, yes, sleep is underestimated!
@canscocappy I was gonna say sleep too. I don’t know if I’m super 12th house, but I do have Neptune there sextile Sun and I do come undone and it’s usually because I’m tired.
@libra-noir Neptune in the 12th is already strong by itself, so the same applies! ? In my case, it opposes my Mercury and sextiles my Moon.
Listening to music really helps me.