Currently I have separated out some creature types:
Insects + Vermin
Swarms, Flora, fauna and fungi, Oozes & Slimes
Demons & Devils
Then other creatures Abolteth, Minotaurs, Orcs. Lycantheropes, Skeletons etc. are all i the Terrors section.
Okay why do it this way? because when I design adventures and stuff I just want to find a slime, or some vermin, or a dire animal and I like to be able to see them all at one time and not flip through pages and pages trying to compare them....but that may be my own hang up.
So I can either continue to section out by types (Aquatic, Undead, Humanoids) or scrap the whole damn thing and just alphabetize it all from A to Z regardless of type.
Thoughts and opinions are most welcome!