When I first got sober I read Norman Vincent Peale's Power of Positive Thinking. And then I applied as much as I could of what that book said. It shifted my thinking, and opened the door to a lot of other similar teachings and readings. Since day one I felt I needed to fill my brain with positive stuff, continually, as much as I possibly could. My brain needed a real good washing in order to get all the dirt out, and replace it with better stuff. I still actually need to do that, regularly. Lots of us got real bad messages growing up. While they're difficult to erase, they're no more difficult than the many other things we can and do recover from.
Affirmations helped me a lot. Louse Hay I think pretty much wrote the bible on that stuff, I forgot the name of her main book though.
I also found The 4 Agreements to be an a very simple and awesome philosophy on living a mentally healthy life. Just had an idea for a new thread... thanks
.