I am not very organized, at all, but my essentials are: shoe racks, file boxes, and those fabric boxes. The fabric boxes go on bookshelves and in the top of my closet, and are often a mish-mash of stuff shoved out of the way. But I do know generally what’s in them, and they sure make me look organized from the outside. I also have of those cube, wire organizers that I’ve used for various reasons in every place I have lived since college. I used it for books, clothes, office and bathroom storage, among others, and highly recommend it.