You say it best, when you say nothing at all

When in a conversation try speaking less.

Less encouragements like: “Wow”, “That’s cool”, “I understand” etc.

Speak in shorter sentences and use more pauses.

Make what you say count.

No need to entertain, be witty or tell stories in order to keep someone’s attention.

Behave in a way that assumes that you could just sit there doing nothing and that would be good enough.