Neuroplastix.com This amazing and wonderful website has the images you can use to retrain your brain by visualization, a type of guided imagery. This website also has lots of background information and products including the Neuroplastic Transformation Workbook that has additional information and hard copies of the images you can use. If you are good at visualization, this is an approach that is always available to you, wherever you are.
Doidge, Norman. The Brain’s Way of Healing: remarkable discoveries and recoveries from the frontiers of neuroplasticity. Penguin Books, 2016. This book has two great success stories for retraining your brain by visualization as well as great background material.
As the Dalai Lama said, “Pain is inevitable. Suffering is optional.” Meditation has been shown to be especially effective at reducing the unpleasantness of pain. You can find more information in the section on meditation in the Science page of this website.