If we have something to say to a friend that could damage our relationship, it's important to think carefully if it's really worth saying.
If we find ourselves getting angry and raising our voices, it's important to take a break and calm down before continuing the conversation.
If you're in a conversation and you don't have anything of value to add, it's okay to be quiet.
Don't interrupt and don't start thinking about what you're going to say next. Just listen.