I didn't realize how long it had been since I had organized my comic books until today.
When the storage area on top of the boxes in the closet gets full, I pull all the comics out, and sort them. First by group (Batman Family, Superman Family, Teams...). Then I divvy those out by title, and put those titles in order. Finally, I bag the books with two books per bag.
Right now, I have the dining room table covered in stacks of books while I sort and bag.
Pom is very happy because the closet is open and the boxes are multilevel, so she's climbed up to the top box, and is taking a nap.