This has to be the strangest, most specific use of a notebook I’ve ever heard about:

Clément Gaujal, a customer quality representative for Nissan who grew up in Paris, recalled that his mother had a tenuous grasp of batch size when it came to lentils, and often ended up serving their leftovers for three or four days in a row. So, after buying a small notebook filled with graph paper, Mrs. Gaujal started a lentils diary: she and her husband and four sons would chronicle how the lentils were prepared at each meal, how much was eaten by various members of the family, what was discussed during the meal, and, of course, what percentage of the offerings were left uneaten. Any family member not in attendance at any given meal was the subject of mild, legume-based ridicule.

From What to Do About the Leftovers? – NYTimes.com.