- whether I think the reader will be confused by what I've just written
- what information I think the reader needs to know in a scene
- leaving space for the reader to react and think about an event, without slamming them over the head with what the main character is thinking
- questions the reader might have about what is happening and when to answer them
I've read somewhere (many places!) that it's a good idea to have an ideal reader in mind when writing your book. I do have one or two of those, including myself--I have to write the kind of book I'd like to read.