This is somewhat a
common problem so OP you are not alone in this, that's the first thing.
And it is
AMAZING that you have identified you have an issue here, a lot of people would think the issue is with the outside world and not their belief so well done.
Just by virtue of identifying that and starting to look for material to help you and surrounding yourself with those kind of thoughts should help a lot in itself.
Because it is a problem others face there is plenty of great books on it, and you will need to study a good few of them before you change properly.
You've been recommend a few good ones, I will condense a list of books and audio courses I believe that you should go through that should help just to kick start you in to your new profitable way of thinking. If you go through all of these one or more should resonate some are direct money related some indirect but it should help you start to change, we don't know what the epiphany point would be but if you go through them all you stand more of a chance as its different for each person
Rich Dad Poor Dad - Robert Kiyosaki
Influence - Rober Cialdini
48 Laws of Power - Robert Greene
Think and grow rich - Napoleon Hill
Anthony Robbins - Awaken giant within (Audio not book)
The Millionaire Next Door and
Secrets of the Millionaire Mind are meant to be very good also but I have not personally read these 2 yet, but I would include them based on what I have heard.
I have
left out my favorite and top ones, because once you have read these then
come back again if you still need it and I will give you the more next level up ones 
after a short quiz of course, to ensure you have gone through them

Good luck on your new winning direction.