What to Say When You Talk to Yourself: Shad Helmstetter: 9780722525111: Amazon.com: Books
To be frank, I think both psychoanalysis and pharmaceuticals as mood-treatments represent the "gods that failed". So why not some form of Cognitive Behavioral Therapy (what self-talk is basically a form of) since those techniques do actually seem to work?
There was a gifted doctor -- a Frenchman with a international reputation who worked for Medecins Sans Frontieres -- who wrote a book called, amusingly enough, Healing without Freud or Prozac:
Healing without Freud or Prozac: Natural Approaches to Curing Stress, Anxiety and Depression without Drugs and without Psychoanalysis: David Servan-Schreiber: 9781405077583: Amazon.com: Books
As far as dietary intervention goes, I'd take a look at Julia Ross's stuff. She has two books: The Mood Cure and The Diet Cure. Both have websites:
Julia Ross' THE MOOD CURE
Julia Ross' THE DIET CURE
She seems to get results. I've heard her speaking on podcasts in the paleo/primal/ancestral health/real food movement, and she says that she has success turning around even people with quite severe mental, emotional, or even drug and alcohol, problems. Methods her clinic was using before -- psychotherapy and drug-therapy -- had a vanishingly small success rate. But the dietary approach, she says, really does work for many people.
Sean Croxton -- a really nice and knowledgable podcast host -- also has some good interviews with the lady. Try googling:
underground wellness julia ross