Practise operating more often from a place of not knowing.
Start thinking more often that you know nothing. Keep open your channels of curiosity and discovery. Particularly when it comes to relationships with other people. When a good friend calls, do you already “know” who they are and what they’re about to say? Notice if this shuts down the way that you listen to them. When the media describes a group of people, for example teenagers, do you take aboard those descriptors when you meet a young person, and listen to them through that filter of generalizations?