Without meaning to, we regularly run movies in our heads of what we don’t want to happen. The result: we scare ourselves stupid and our brain gets a signal that this is what we want and obliges with nerves and anxiety. Try this. Visualise yourself in the situation. See it start to go wrong. Forcibly destroy that image, tear it up, burn it. Now erect a big screen in your mind’s eye and see life going well. Notice how happy and confident you are. Do this before any challenge and retrain your brain on what you need from it.