Don't lose the reader. Avoid unattributed pronouns at the start of a scene or chapter unless it is a story device. Do the who, what, where, when, and why check at the beginning of transitions so the reader isn't lost. This doesn't mean the five W's must be there, but don't assume anything about the reader's retention rate. And don't forget to set the scene goal. The novel may have put down for days or weeks. When a reader picks it up, some or all of the five W's can pull them back into the story.