Resources

Reading

• How to Read a Book: The Classic Guide to Intelligent Reading by Mortimer J. Adler

Collecting ideas

• Building a Second Brain

Writing

• Socratic Scribbling: Great Ideas From Great Books
  That Will Help You Think and Write Better: Walsh, Malachy, King, Katie

• Write of Passage – An online course by David Perell

Editing

• Editorial Services – Charles Davidson (charlesndavidson.com)

Socratic Communities

• Catherine Project

Dialectic

• The dialectic life 

Liberal Arts

• The Trivium: The Liberal Arts of Logic, Grammar, and Rhetoric

Philosophy

• Home | History of Philosophy without any gaps

• PhilPapers is a comprehensive index and bibliography of philosophy
  maintained by the community of philosophers.

• Taxonomy of Philosophy