Story world. In First Half, where I’m still working on setting up the story world, I'm extra careful to include the right details. By the time I get to Second Half, suddenly my main character who's been raised in the wilderness since infancy knows how to read a clock. I don’t think so. To help with keeping the world consistent, I'm drawing sketches of buildings and maps, making lists of technology, foods, power sources, etc.
Voice. In First Half, I've worked hard to eliminate words like "but", "walked" and "looked" and to write from my character's perspective, making those interesting internal observations that she'd make. A Wordle on First Half shows me I’ve used the word “was” 18 times. In Second Half, I’ve used “was” 284 times!
Um...I think a little more work is needed.