That is a good question but a tough one to answer.
Nothing to back this up but I would think if there are things that you find
disturbing then try not to watch them.
For example I find those dark shows about murder and things like that very
disturbing so I try not to watch that stuff. I feel it really affects my mood.
Just something to think about.
Even with music these days I try to stay away from the sad stuff.
I know this isn't something you probably don't already know but I hope
it helps in some way.