My method of staying sane is way less complicated. 

I am not unique or special. I am human. Ergo things that keep humans sane should work on me. 

So I read up on mental health and then did those things. Sleep, nutrition, exercise, sunshine, make friends, community service, clean air. 

It's likely I may still experience issues later in life. But all life is always temporary. It's about the now, appreciating this moment when I have a dog beside me and a snoring spouse and a wool blanket and a nice book. 

I can only control what I can control. 

I'm learning rock carving. Rocks are awesome and last through lots of disasters. 

The worst argument in the world remains true: Someone's gonna do it. Might as well be someone who will make some attempt at doing it ethically and with kindness. You don't want this done by folks whose alignment is, say, chaotic evil.