How do you keep other people in your household from interrupting you when you’re trying to do Deep Work or to meditate?

Communication is key. A butterfly on my door means I meditate.
We have an open door policy at our house. If the door is shut you do not enter unless it’s important or an emergency then you knock.

Let people know not to interrupt you. That’s pretty much it, just signpost that you need to focus or do some meditation and that seems to work. Not the dog tho unfortunately 🤷🏻‍♂️😂