Avoid too many levels of headings to avoid having to make each visually distinct.
I settle for 2 levels.
They reveal the structure of your arguments.
Typographic parameters:
- Don’t use all caps.
- Don’t underline.
- Don’t center.
- The best way to emphasize is by putting space above and below.
- Use bold, not italic.
- Point size should only be a little bigger.
- Suppress hyphenation .