I have to make it a point to connect with the earth, air, fire, and water to keep redirecting my thoughts away from the ones that take me to the darkest spaces.
A walk by the mountain stream, a barefoot walk in the grass, foraging for wild edibles, planting something in the garden or a container to nurture and watch grow, primal screaming in the forest, taking a bath or shower - it feels as if water cleanses my aura, I also keep a spritzer bottle handy (sometimes with a few drops of peppermint essential oil in it, too) to act as a portable air conditioner as well as to cool off my often times "hot head", I smudge myself and my living spaces with sage sticks, build a fire in the fire pit thingy and sit with it until it burns out (often writing down my worries and burning them, too), do many deep breathing exercises all day, every day, intermittently.
If I allow myself to be still and continue to think of the things taking me down, I'll only keep going further into my despair. Action and momentum, even the smallest ones, really help to dig me out. Wishing you well in discovering some things that are helpful for you.