Saying "just quit social media" or something doesn't work. You have to have the mindset that you cannot control what happens in the vast majority of news stories. If the federal government does something I don't like, it's not worth my time to be angry and let it linger in my head for the day, which only hurts me. Outrage seems to come from a lack of control over a situation.
Shift your focus to things you can possibly control, e.g. the news that's happening in your local community where you have a say in how things are done.