I tried to deconnect my brain from what I want to say. To try to explain it, it's like trying to recover the feeling that we have when talking for ourselves like doing a monologue. To try to disconnect from the people talking to us, to not observe their reaction, what they are looking at, their posture, but just fix a point, maybe like in between their eyes. You can even like unfocus yours if it make it more easy. And imagine that you talk to like a wall, that only you can listen.