A friend of mine also claps her hands loudly for emphasis. This seems to create a vacuum where that old thought lived. Greater is He who is in me than He who is in the world. I know what to say and do in every situation because Jesus is in me . . . When the unwanted thought comes in, cancel it and then implant truth.
Consistency is the key to transformation.
In ourselves, we cannot forgive those faults and wounds and get on with new, healthier thinking. Our old brain is designed to recycle old, negative conversations and hurts. Forgiveness and implanting God's Word is the only way I know to get victory over obsessing thoughts. Let me know how it goes. We all laugh.