Talk about others as if you were talking to their face, or if they could hear you in real time. Because sometimes the truth will leak out, or they actually might be in the room with you, or behind your back, unbeknownst to you.
To talk shit is fine— everyone does it. But the question:
If you say x, y, z …. would you actually say it to the face of another human being?
For example before you say anything sexist, racist, classist, or whatever … would you actually say it to that person in real life, to their face?