I like the idea of writing whatever's interesting when you feel like it. What about the stuff that isn't interesting, but necessary? Do you ever find yourself stuck on the scenes that are needed to fill in the gaps between what you've already written?
Right now I'm a tiny bit stuck on just what Kevin plans to do in the chapter I left off on, but on the whole I haven't had a problem filling things in. If an interesting thing isn't begging to be written, I do write in order as much as possible. I think there was one other day back during NaNo when I was coming up on a heavily researched chapter, but I needed a little more research and the intro to the chapter just wasn't coming to me. I paused and edited something in PBox that felt semi-relevant and then had a good beginning by the end of the night.
I'm looking through my documents now to see how out of order I've been writing. Y'all are on ch. 8 while I'm writing ch. 22 and ch. 25 (just finished ch. 24 today and it is a doozy for anyone who's been waiting to know the thing I finally revealed in it!) I also wrote this tiny smidge of the next novel that was begging to come out. Probably because it's related to ch. 24 in the grand scheme of things.
I had chunks of ch. 1 and ch. 2 written since I first tried in 2015, but back then I thought ch. 1 was actually ch. 1-3 and ch. 2 was ch. 4 -- it's much better this way. The first thing I wrote in September was the beginningish/middleish and end of ch. 3, then I wrote ch. 4 and ch. 5 in their entirety, then the beginning/middle of ch. 6, then the 3rd scene of ch. 7, then most of ch. 10, then the beginning and end of ch. 11 (but not the middle), then part of the end of ch. 12, then most of ch. 17, then a decent chunk of what's this ch. 24 to ch. 29ish stretch (but they probably won't end up exactly as I'd written them then if ch. 24 was any indication, just mostly as is). So that was kind of my September and October. I also rehauled PBox ch. 10-12 some time during all this.
Then November hit and I decided I should make more of a concerted effort to write in order. So on November 1st, I went back and filled in starting at ch. 1. I know I wrote bits and pieces of ch. 19 and ch. 20 in early November before I got there and a little more of this ch. 24 to ch. 29ish stretch, but otherwise I tried to stick to going as much in order as possible then. Because that's the point of NaNo: write a novel, not just interesting bits. But I think knowing that those interesting bits were coming motivated me to get to them. They didn't count to my word count for the month, but they already existed. Oh, it looks like I also wrote more of ch. 11 before I got there as well. I found a bit where I called ch. 8 by title, but it was listed as ch. 11. I'm really glad I sped up the novel from my original thought. It would have
dragged.
Before I switched to just summarizing the scenes for markers, I apparently got tired of mislabeling them "Assumed Chapter Number: Possible Title" and just started calling them things like "chapter something or other" and "chapter later still." It's actually really fun looking at this version history because I can see when I got to the chapter that these snippets were part of because it tracks me deleting them. Apparently December 6th is when I penned a very small bit of the ultimate end. And January 16th is when I committed to a title for that last novel and switched to summarizing the snippets to mark them. Good, because "chapter later still" is very confusing even when I put the snippets in chronological order! haha
Have you ever had that happen, where you want to change your ending before you write it but feel like you can't?
I mean, I'm thinking of PBox specifically here, knowing what I know about it now. But I feel like if I had figured it out and decided Brian could live, I wouldn't have had the six month slump. Poor AJ and Howie. I guess I just accepted you would die without hard feelings. I couldn't kill you guys again; you're all my little demon buddies! Also Nick would murder me in my sleep after the last time! Oh look, here he comes now screaming "THE *@&$ YOU SAY ABOUT KILLING MY FAMILY FOR THE PLOT?!?! VENGEANCE!!!!" And Kevin's standing behind him shaking his head, pulling out some bandages, and calmly calling "Your actions have consequences, Nick!"
That sounds like a good compromise. That way, you have options - you can write a sequel if you want to, but there's no obligation to, since the original story had a satisfying ending on its own.
I'm also thinking of published series, even if they're planned series at that point. Where you can read one book and it's enjoyable on its own, but more enjoyable in the entire context. That would be the worst if everyone said things like "The first and fourth ones are really good, but I just can't reread two and three." Meanwhile as the author, you're like "But three is my favorite! :'(" That was all hypothetical. I didn't want to call out any published book series in particular.