This NPR story completely supports what I know about the power of changing the story you tell yourself. Listen to Editing Your Life Stories Can Create Happier Endings.
Changing the endings of some of my worst childhood memories is exactly what I did with Carol Moss,
the practitioner from whom I originally learned Emotional Freedom Technique. For my
childhood story re-writing we used Eye Movement Desensitization and
Reprocessing (EMDR). It moved me very far along in undoing the negative
beliefs those old childhood stories had taught me. With Carol Moss and EMDR I realized you can re-do the past. Going into my subconscious, unearthing those old stories and putting new endings on them moved me out of the worst of my negative beliefs about myself. I felt so free afterwards!
I imagine the writing exercises suggested in the NPR story are helpful, but I think accessing the stories where they live and churn out negative beliefs -- in the subconscious - is the way to go. There are several ways to do it and you have to find what works for you, but I really liked working with Carol Moss. Good luck.
(Often practitioners of alternative therapies aren't covered by health insurance, but Carol Moss is a certified social worker who takes
insurance. I didn't get complete reimbursement from my health insurance because she's out-of-network, but I got some.)