The Genie Within: Your Subconcious Mind--How It Works and How To Use It
[Most recent review on Amazon.com]  This book is an absolute gem.  If you're looking for insights on single-mindedness this book has numerous ideas, concepts, and exercises that will get you where you need to be.  From my newbie experience the results come quickly.  I've seen changes in happiness, demeanor, increase in opportunities (monetary and social), and lowered stress.--This text refers to an alternatePaperbackedition.