I am not an expert... In my experience, therapy that approaches fluency with tips or tricks isn't effective. For me, world class therapy was a system. Building and developing the basics. Building on the basics. Slow progression through practicing what you learn. Mastering one stage before moving on to the next. Layer after layer of development. None of these intermediary steps used in real life. You don't struggle through the process in public. You do the work with your therapist and you keep practicing in private. You eventually advance to a level that you are ready to use your fluency in public. Compare it to learning a musical instrument. You don't perform a concert until you are ready. Same thing. You practice everyday. You go to your lessons, and the music teacher corrects and guides you.