Long drives...which can be detrimental while manic, so my husband gets to decide if I can take a long drive or not (it is very frustrating in the moment). He takes all the keys from me in that case.
Long showers (unless I'm super depressed and then have an aversion to showers)
Prayer and deep breathing.
Grounding techniques.
There are many things I've been taught over the years that I have applied and I know would work but it is hard to remember when you are under a black veil of depression, your anger and irritably are out of control and your anxiety is on the verge of a panic attack.