Read and study: These are just some of the hundreds of references
1. The Power of Your Subconscious Mind by Dr. Joseph Murphy
2. As A Man Thinketh, by: James Allen
3. Think and Grow Rich, by: Napoleon Hill
4. The Law of Attraction, by: Rhonda Byrne
5. The Magic of Believing, by: Claude Bristol
6. The Power of Positive Thinking, by: Norman Vincent Peale
7. You Can Heal Your Life, by: Louise Hay