For work, I've created notebooks for individual clients.
For courses (I have a college and professional degree, but some sometimes take evening classes), I create notebooks for the course, for individual projects, for books I'd like to borrow from the library.
I have many notebooks for interests such as web design. At one point, I was considering creating a blog. I saved notes with site examples I found inspirational, as well as images and fonts.
I have taken many advanced level sewing and tailoring courses. I have created notebooks by type of clothing and saved images of garments I'd like to make or find interesting. There are notebooks for sewing, couture, pattern making, and tailoring techniques and fashion history. I also have saved vintage sewing and tailoring texts found online.
For any major interest, I have created a notebook, e.g., politics, literature, U.S. history, education.
I have over 33,000 notes.