My fantasy comic is planned to be 15 chapters long. When I started posting the comic online, I had:
- a description of the basic gist of what would happen in each of the first ten chapters
- a rough idea of how the whole story was going to end
- a rough outline and list of scenes that were going to happen in chapters 1 & 2
- half of chapter 1 scripted
- a buffer of five finished pages (that disappeared startlingly quickly)
Now, I have a rough outline of the whole story, and while I'm working on one chapter, I try to get the list of scenes for the next chapter put together, and get it scripted before the chapter I'm on is completed. Due to the hiatus I took last year, I'm about 20 pages ahead of the pages that are going online right now. The chapter that I'm working on now is completely scripted and thumbnailed.
I like having the basics planned, so I can foreshadow and build towards certain things and such, but still giving myself room to create new ideas as I go, so that as I'm finishing a chapter, the one that's coming up will feel fresh and exciting since I Just Wrote It!
I did an autobio comic before this one, and my process was kinda a cross between the two. I basically kept paper with me that I'd jot down a list of things that happened that could possibly make comics ("grocery shopping with brother" "dropping rice on the floor" "friend's argument about grammar" "cats are too excited") and then when I would sit down to make a comic on update day, I'd look at that list and try to kind of write out an idea of a strip and see which one had the most promise, and then I'd start making thumbnails and fussing with the best way to set it up.
I didn't want the strip to fall too far behind my actual life, so my schedule stayed pretty tight, but all of the lists of ideas and rewriting a silly joke 10 times to make sure the timing works definitely resonates with me as well. xD