Academic PDF on Commonplace Book note taking.

About the Commonplace book.

The index card method by Raul Pacheco-Vega, PhD

Brief summary of the Pile of Index Cards system. (PoIC) An index card note taking system.

The Hipster PDA system of taking notes.

Article about keeping notes on index cards by Ryan Holiday. General introduction to the practice.

The Key For Remembering, Organizing And Using Everything You Read - RyanHoliday.net. Author describes his system for keeping notes on index cards.