You get that automatically if you try to be charitable when interpreting somebody's words. More often than not, this will put you on the same page as the person you are talking to.
Actually, I think it's easier to remember it's always an opinion than to always be charitable. Maybe I really don't like a person and so it's very hard to be charitable in a given moment, but that person's statements are still their opinion and don't get to override my own experiences.
