A few years back I came across "The Science of Getting Rich"  by Wallace D. Wattles.  Of course the title is intriguing but what was even more interesting is that it was written in 1910.  The book is not very long and I was looking to see what someone from 1910 had to say on the subject. So it is basically the concept of mind over matter to get what you want.  In one way or another we all use the concepts to a limiting degree.  This book will sharpen your focus to maybe achieve better results.  The book is in public domain and I have included a copy here on this post.

Mr. Wattles also wrote some other books, "The Science of Being Great" and  "The Science of Being Well".

Wallace D. Wattles