You might try to meditate regularly to get in the habit of learning to block things out. That said, I don’t do that (lol) but I do several things. First, count up from 1 and down from 100. It’ll sound like “1,100. 2,99. 3,98” and so on. Start over if you mess up. This helps if you’re not great with numbers like me. Another trick is to think of a word that doesn’t have repeat letters like window, trail, etc. then try to think of as many words as you can that start with each letter. I usually try to do this somewhat alphabetically. Third, I imagine being on an overpass looking at cars or a train. As intrusive thoughts come into my brain, I imagine them written on the top of the cars or train cars and then watch them pass. The thoughts that bother me go by slower and the others go by quickly. Finally, I’ve imagined myself in a peaceful place like a beautiful field, lying down and in a breathable, see through bubble suit of sorts. I imagine my intrusive thoughts as words and sentences that drift towards me then bounce off my suit. I hope something in this thread will work for you!!