Wow, that's all really helpful! Thanks onmyway! I have done the stream of consciousness writing thing and I do find that helpful sometimes. If I'm in a really bad state it usually consists of just two or three words repeated over and over.
I agree that counting is helpful too. And labeling objects. I was not familiar with the "box technique" so I'll try that for sure. And I like the idea of practicing it even if I'm not anxious. I can see how that would be helpful "conditioning".
For some reason I sometimes find it helpful to look in the mirror. I can't explain why, it just helps sometimes. Perhaps because I then talk to myself a bit?? Or at least, repeat a couple of reassuring sentences.
Good luck to all who struggle with this!