I am trying a new approach to my intrusive thoughts. In my case, rumination brings me to a state of anxiousness as I go on and on about all the possible catastrophical scenarios. What I am doing now is forcing myself to embrace those anxious thoughts, asking my mind to give me more of that anxiousness, paying attention to what my physical reaction is like (do I feel my heart rate go up? Shortness of breath? chills?) and I try to stay in that moment for a while.

I've found out that anxiety is quite a coward enemy: when you run towards it, it goes away pretty quickly. Intrusive thoughts are still there, but now I ruminate way less!