We broke the fields down into categories.
All of our jobs use at least "Background" and "Assignment" while some of our more creative type jobs use a combination of the following:
Brand Platform
Background
Assignment
Growth Opportunity
Target
What We Need to Convey
Support
Brand Character
Mandatories
Considerations
Deliverables
We use disply rules and display only the fields that are required for the job type. This also makes it easy to do summary reports because you can report on the relevant topic for that particular job type.