In coal mines, entries and headings, bords and walls serve similar purposes.
The topics of the other headings do not require express mention.
Headings that Float: A common mistake when it comes to active space and web page layout are headings that use the same amount of space above and below the heading.
Underlining text other than links: Underling text such has headings will make them appear to be links that don't work.
Titles and headings should be a larger font size than your body text, because you want headings to stand out at a glance.