Editing in Layers

I've got another reader request writing topic this week: editing. This is a pretty complex topic, and I'm sure that each writer approaches it differently. In general, this is how I think about it.

I see the editing process in layers and generally approach these one at a time, though you may work differently and do it all at once or as you go. However you work, it helps to break it down and think about what you should be considering as you review your work.

1) The story level
This layer is all a...