Nothing changed my perspective on intrusive thoughts like learning they are directly related to mental exhaustion. If you notice them, you need mental rest.
Sleep is helpful but just not doing anything for a little while is helpful too. Sitting around staring into space or looking our a window, no TV, no phone, no book, no shampoo bottle instructions; rawdog reality. Not for super long, 2 or 5 minutes is enough, don’t need to push thoughts away or think of nothing or meditate if that’s not your thing. Just try doing nothing at all for a little bit, let your brain rest.
I get you, I also have raging ADHD.
The point is -not- to not think, you can think as much as you want about whatever you want. This is NOT meditation
Just don’t be doing or watching something for a few minutes. Listen to silence. Not for a long time, just a couple of minutes is enough.