A Writer's Pre-Flight Checklist on the Adventures in YA & Children's Publishing offers a check list to test your manuscript.
Create Key Moments with Secondary Characters from the Live Write Thrive site discusses a method for the creation of relationships between your main character and their supporting cast.
How Much Do You Need to Describe Your Characters? from The Other Side of the Story is an interesting read on the subject of character description - a topic that I personally need to look into.
Thinking in Multiple Drafts is an excellent article from Steven Pressfield about wearing 'a different hat for each draft'.
How Much do you Need to Describe Your Setting? from The Other Side of the Story is a checklist on necessary setting description.