Build a Second Brain

Building a Second Brain is a course from Tiago Forte that presents a structured approach to consuming knowledge for interative understanding.

It's rooted in Getting Things Done and the idea of progressive summarization. Tiago also presents the PARA approach as a taxonomy for high level organization of the artifacts that result from summarizing the content you consume.

My favorite summary of the Second Brain course is from Maggie Appleton and includes a lovely set of illustrated notes.