guess what I'm doing?

Some things that writers try to balance in the structure, word choice, punctuation, etc. of every sentence/paragraph/scene/chapter, A Short List:

- What sounds good? What won't break the flow?
- What is appropriate to the narrative voice, whatever that is?
- What makes sense?
- What presents events in the right order (chronological, etc.)?
- What would the characters in fact do?
- What moves the story and/or plot along?
- What enhances any one or several of a number of themes in this story?

Sometimes, many of these line up nicely. However, usually at least one is (or initially appears to be) (for the first few months) largely orthogonal to at least one of the others.

Rewriting: timestopped Tetris where you have to figure out what shape the blocks are by second- or third-hand testimony and staring at other people's Tetris games. Also, the board is circular but all your pieces seem to be made out of squares.