Disclaimer: the Zettelkasten method has been recently hijacked by the productivity bros community, but this ancient method of organising data is actually truly useful, even for those whose brain has not be addled by an excess of testosterone. What is a Zettelkasten? Zettelkasten is a method of organising information. The name Zettelkasten literally means note-box. In this method information is organised in paper slips similar to index cards. These slips are then kept in boxes and hence the name. Zettelkasten has a great advantage over traditional note keeping (in notebooks, for example): which is allowing a greater degree flexibility when ordering the notes. In a notebook the position of the notes is fixed, while in a Zettelkasten the cards (and hence the notes) can be reshuffled at will. In addition, the Zettelkasten includes links between the notes, as will be explained in more detail below. The Zettelkasten method evolved over time and, as such, there is not a single method bu...