Reddit reviews The Anatomy of a Choice: An Actor's Guide to Text Analysis

It's not that you shouldn't do that, but you want to replace it with an action. This doesn't necessarily mean doing something physically, but if I assume correctly that the narration in the video is your inner monologue, there needs to be some kind of response to that. You are listening to the voice, so you are engaged by it. Having your blocking be as simple as sitting and listening is fine, but there needs to be a connection between your thoughts and your blocking, which is sitting in the shower/tub.

To fix this, you need to realize that in this scene you have two characters. There is the character of your Inner Monologue and the character of Your Character (physical you). Your Inner Monologue wants one thing, and You want another (again, an assumption, but I assume this because all scenes are built on conflict - if you both wanted suicide, that would happen and there would be no scene to speak of). What do you want the voice to do? Do you want it to stop? How will you make it stop? This page has a breakdown of what objectives are and how you play them.

If you still continue to sit and listen, that's totally okay! But there shouldn't be a disconnect between the two characters in the scene. There should be a give and take, an action and a reaction, a response. Then the other character plays from this response.

I strongly suggest the acting book The Anatomy of a Choice by Maura Vaughn. This has helped me in many situations as an actor. Also, read lots of David Mamet. Read his plays, read his essays on acting. Another book I find helpful is A Practical Handbook for the Actor (written by students of Mamet) and The Art of Acting by Stella Adler. Reading is an actor's greatest tool other than just getting out there and performing.

Understanding objective is the first step toward becoming a fully invested actor. It will change the way you look at the stage and screen.

edit: added a thought