The professional today will be a lifelong learner in order to stay on top of the game. This section will provide several free courses to help you "self-develop."
A good starting point is to read "The 7 Habits of Highly Effective People" by Steven Covey. The foundation of this book is that one succeeds by developing the correct habits. The challenge is to identify the correct habits. Covey provides those for the reader.
The classic work related to developing one's professional career is "Think & Grow Rich" by Napoleon Hill. It was first published in 1937. It presents principles that are shared by many successful people. It is based upon interviews with scores of individuals who were able to succeed in spite of major challenges.
Go to Google Books to review a copy of this classic. Think & Grow Rich, Napoleon Hill