Books are machines for generating empathy.
Read fiction. I don’t mean “read sf to have ideas about the future.” I mean “read any form of fiction, genre or no”. Fiction allows us to have other ideas, live other lives, see other perspectives. It allows us to escape and re-consider the world from outside ourselves. It allows us to think at lengths and timescales that we may not from day-to-day. It is a shortcut to containing multitudes; to other minds.