I would recommend this book, the book might of been written many, many years ago but the principles still hold true.. Not outdated by any means.. David Schwartz is very engaging, the book is only about 4 hours long, but it can help huge goals become possible
This was a very straightforward book that pinpointed methods of positive thinking exercises to change your personal and professional life.
This book made so many things clearer for me with respect to what exactly needs to be done in order to attain my goals. It's encouraging, uplifting, and filled with truth and wisdom. It was exactly the pep talk I needed to get me refocused in the right direction.
Another great book identifying the strength of our minds. This books touches on dealing with social relationships, goal setting, and personal management. Build those brain muscles!