One thing I will say about my typed up prep notes is that they do not include specific adventure information (which I usually run out of a module or hardcover) and I copy/paste stuff the PCs have not gotten to yet but may still have a chance to interact with from one session's notes to another. So if you were to look at the binder in which the print out of these types notes live, they might seem repetitive, but it is not like I am rewriting it every time, I am just reorganizing it, so the stuff they might go back to is with the current notes and not further back in the binder forcing me to flip through and remember which session it was that I detailed it for and didn't use.