I use incunables in much the same way others in the personal knowledge management space might say fleeting notes. Ideas are born and written onto a page where they are kept in proverbial cribs. Some may grow and and develop into young adults others into old age. Some flourish and later senesce. Ideally one or two outlive me.
As is typical of many species, the care and feeding of the adolescents can be a trying time.
Today’s #ManuscriptOfTheDay is Ms. Codex 1060, a calendar and lectionary, ca. 1450, and gradual from the last quarter of the 15th century, for use in an unidentified Carthusian foundation, likely in Germany #medievaltwitter
— Schoenberg Institute (@sims_mss) September 4, 2021
See also MarginaliaMonday.
I carry around a small notebook (usually a 48 page Field Notes) for short fleeting notes. Later I copy them into my commonplace book/zettelkasten/digital garden and expand upon them.
Waste books were used in the tradition of the commonplace book. A well known example is Isaac Newton’s Waste Book (MS Add. 4004) in which he did much of the development of the calculus. Another example is that of Georg Christoph Lichtenberg, who called his waste books sudelbücher, and which were known to have influenced Leo Tolstoy, Albert Einstein, Andre Breton, Friedrich Nietzsche, and Ludwig Wittgenstein.
Lichtenberg, Georg Christoph (2000). The Waste Books. New York: New York Review of Books Classics. ISBN 978-0940322509.