Negative Thoughts

When you become aware of all of your negative thoughts that are not serving you, what is the next step? I am in awareness but I’m having a hard time transitioning – I see the thought and the results it’s creating and I’m aware that it’s not serving me BUT the thought still feels true. How do you practice thinking new thoughts or even ladder thoughts?

Conceptually I understand but how do I actively implement? Writing out intentional models and what else can I be doing to help practice the intentional thought? Right now I’m feeling a lot of suffering because I’m in so much awareness of all the negative thoughts