Ever tried, metaphorically speaking, stepping outside of your thoughts and asking the question non judgmentally ‘why do I think in this way?’ Thinking about thinking creates distance from your thoughts. It gives you space.
Another possibility is to apply this sentence to a thought ‘I could be wrong’. Even if you believe you are right, it can be beneficial to add ‘and I could be wrong’. Observe the power a thought has over you if you believe its right. Specifically, intrusive thoughts are common with anxiety and intrusive thoughts only work if they hold a power.