Back in high school I used to have separate notebooks for all subjects and I kept them relatively neat (my handwriting sucks). But ever since I entered university I just don't give a single fuck. All of the notebooks I use have stuff from all sorts of different courses jotted down into them and there is no overall system to how I write them. I also don't bother following the lines very accurately so the text just wanders all over the pages, I often don't bother writing full sentences, and my handwriting has only gotten worse over the years so I often have real problems trying to figure out what the hell the arcane symbols in my notebooks mean.