My personal methods for this, may or may not work for others.
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don't take personal responsibility for things you can not personally control. This is the source of despair.
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choose where you get your information from carefully. If the source is pushing a particular version of events too strongly they're trying to get a reaction from you. Drop em.
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Getting more than one source prevents being pulled too far in one direction. Having too many causes confusion and uncertainty. Two or three good sources of news is enough.
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study history. Read about politics and events throughout all of human history. This gives you context and can be very soothing as you get a perspective broader than any single human life.
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focus on yourself and your life. Is that improving? What small steps do you want to take to improve that?
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drop the scripts you're given. You've been told what Your life should look like but it's rarely possible to meet those expectations and the news re-enforces this. Drop the scripts and live your own life based on what is possible and desirable for you.
There's probably more I could say here but that feels like the heart of it.