This is a page of books and other material I have found extremely helpful. These can range from personal, professional, or spiritual development.
Books
The 21 Irrefutable Laws of Leadership – John C. Maxwell
The Life-Giving Leader: Learning to Lead from Your Truest Self – Tyler Reagin
Wooden: A Lifetime of Observations and Reflections On and Off the Court – Coach John Wooden
The Cuckoo’s Egg: Tracking a Spy Through the Maze of Computer
Videos
How Bad Do You Want It? – Eric Thomas
The Man in the Arena – Teddy Roosevelt
Last Lecture: Achieving Your Childhood Dreams – Randy Pausch
Process Over Product – Inky Johnson
Overcoming Hopelessness – Nick Vujicic