I've written two novels before the one I'm working on, one published and one not, but this is the first novel I've written with the aid of post-its. I'm not sure how that was possible. In any case, I'm totally post-it dependent now. Not only must I have post-its to write up stray and potentially brilliant thoughts, but they must be in different colors and sizes. Sometimes I use them to count up how many pages I've written so far (I only do this once a day--strict rule); to make a note of something I've thought of for future chapters ("The cheese in Carl's locker--he should forget about it, and later there is a suspicious smell"); or small character insights ("should Jason work at the horse farm?"); and of course for cryptic notes that I'll be unable to remember the significance of ("The mother-accusers should come later").
A question for the ages: would post-its have improved the output and/or work of novelists of the past? I think James Joyce would have taken to post-its, but Virginia Woolf would have scorned them as plebian. Tolstoy: No. Dostoevsky: Yes, but he wouldn't have been able to keeep track of them. I can't decide about George Eliot, but Dorothy Sayers would have been a fan, and also Balzac, I'm sure. If Coleridge had had post-its, he would have been able to take the interruption from the person from Porlock in stride--a few judicious jottings and he'd have been able to slide right back into Kubla Khan and we'd know what was supposed to come after

For he on honey-dew hath fed,
And drunk the milk of Paradise.

Maybe there could be a reality show that goes back in time and offers post-its to writers. I know, not much of an audience.