I don't think it is trite: you need to remind yourself that the information you ingest will have an effect on you. If you're deeply informed about an ongoing violent conflict it will have a negative effect on your mental health as you'll watch a lot of violence.

I've been practising information hygiene for a while - if I can't change anything about problem X and it does not affect me or my family, should I be deeply informed about it? - and it has done wonders for my mental health.