I thought that there was a large post a few months ago, but didn’t see it. So here is one that also discusses other ways to organize stuff:
http://simplycharlottemason.com/scmforum/topic/ot-organizational-triumphs-that-you-have
Here are some older threads:
http://simplycharlottemason.com/scmforum/topic/how-do-you-organize-your-booksshelves
http://simplycharlottemason.com/scmforum/topic/book-organization
Right now my books are a big bookcase I built that is wall length. I store the books according to topics. The literature free-reads are not organized into any particular order for the younger books, although the chapter books are all arranged on the shelves and I’ve read them all so many times, I kind of know where things are.
Where do you store your bins? How many do you have? I have wondered about this a time or two, but wasn’t sure that we had the space to do it.