Umberto Eco's underground student classic How to Write a Thesis describes a useful index card system for organizing knowledge.
In 1977, Umberto Eco wrote a small handbook to help struggling students. How to Write a Thesis has been in print for over 40 years. Used and beloved by generations of students in Europe and beyond, it was only recently published in English. But it’s not just for academics. Anyone who researches or writes for others will find something useful here.