What helps you to concentrate when your brain just won't shut up?

Title. I realized that even when I'm having a fun time gaming or drawing, my ocd just won't shut up and tell me that my hands are contaminated, causing me to compulsively sanitize them again and again. Which then breaks my focus and joy completely, making it unnecessarily hard to focus, least alone enjoying the activity of gaming and drawing.

Olanzapine does help to a degree, but it's far from optimal still.

Anyoneelse experience this? What made you actually concentrate on the current activity, if anything?