I always thought that I was quite well-organised, partly from having done jobs that were highly systemised, like librarianship, teaching and managing busy companies, but I recently acknowledged that there's so much going on in the process of creative writing that I needed to make a note of things to do and not rely on memory to prioritise tasks.
I went over to the Linux operating system earlier this year, which features a Notepad app on which I write a list of stuff that needs checking; this helps my efficiency. I dislike being nagged, but if I do it to myself it sort-of works!
I once knew a quiet gentleman, who regularly used the community centre IT suite that I managed. If I were casting a mad professor for a film, I'd have chosen him, as he was impressively qualified in matters of science, so much so that he had several money-generating patents in his name that meant he'd retired early. I used to see him regularly consult a little notebook that he kept in an inner pocket of his suit jacket, so being a nosy writer I asked him what it was. He gleefully revealed that for years he'd been writing down a list of ten things to do before he went to sleep at night. His sleeping mind often worked on the tasks, and on waking he worked through the jobs one-by-one; any that he failed to complete went to the top of the list to tackle the next day.
He made me feel woefully disorganised, and, nowadays, I think he was on to something.