The disciplined mind has mastered at least one way of thinking — a mode of cognition that belongs to a specific scholarly discipline, craft or profession. Lawyers think like lawyers, engineers like engineers, managers like managers.
Start by figuring out the central concepts of the discipline you wish to master. The field you choose has key foundational concepts, methods and procedures.
You need to develop many “entry points” into your discipline. Those who have mastered a subject can think about it in many ways: storytelling, debate, graphics, humor, drama or classic exposition. If you communicate your expertise in only one medium, then you don’t really know your subject.
The end goal is to “perform your understanding.” This isn’t mere recitation of known case studies or performance of standard experiments. You must use your knowledge to attack problems you’ve never seen. You then need expert feedback to determine how well you fared.
Howard Gardner: Five Minds for the Future [5 MINDS FOR THE FUTURE -OS]