For those who write stories long enough, sometimes you’ll have a writer’s block for one chapter, which prevents you from writing the rest of the story, but your brain keeps pitching you chapters that come later in the book. Like, you’re struggling with this important chapter in the front of the book, but the climax is writing itself out perfectly and entirely in your head. You sludge through the chapters in between, because you really want to write that climax, but when you finally reach that point in the story, the climax just disappears. Now the ending is spinning itself beautifully in your head but dang it, you want your epic climatic battle. Where did it go?
The answer to this is to just write down the climax somewhere when it’s being nice and writable in your head, even if it’s too early in the story and things might change by the time you actually reach the scene. Basically, instead of writing in order (Chapter 1, Chapter 2…), write whatever that pops up in your head. It’s a little unusual, since most of us are linear writers, but writing the scene out of order might help clear up some blocks. And if we’re still stuck, at least we wrote something.