I just reorganized the one in my bedroom and it took forever, I have almost two shelves of tbr. Things are a bit out of control on that front but I'm glad they are all together now and I don't have stacks of books in front of it now. However I now have stacks in front of the other bookcase because I couldn't make myself do that shelf tonight as well.
I went with organization by type (tbr, series, trade comics, coffee table, ect) then alphabetically. How do you organize you're shelves?? Also do you have not book things on your shelves? Or place holder things? On the shelf with my comics I put coloring books and a few boxes of colored pencils because I know that we are going to be adding to those.