By type.
History is one section, Sci-Fi another, Political/Educational yet another, and so on. Within each section I arrange the books together, in order, if they belong in a series (Star Wars books, for example, would all go together regardless of author) but if they aren't in a series, then I just put them wherever. (If I have multiple books by one author, I arrange them by author)
This system works pretty well, although since I store some books on my big bookcase, and some in the shelves in my closet I have multiple sections for each genre. But I can remember generally where everything is; I only have a couple hundred books. You can never have too many.
History is one section, Sci-Fi another, Political/Educational yet another, and so on. Within each section I arrange the books together, in order, if they belong in a series (Star Wars books, for example, would all go together regardless of author) but if they aren't in a series, then I just put them wherever. (If I have multiple books by one author, I arrange them by author)
This system works pretty well, although since I store some books on my big bookcase, and some in the shelves in my closet I have multiple sections for each genre. But I can remember generally where everything is; I only have a couple hundred books. You can never have too many.