Zivush - 7:54 am on Sep 17, 2012 (gmt 0)

Here's an example of heading hierarchy of web pages (Headings in descending order of importance)-
[h1]
Opening sentence. <line break>
introduction
[h2]
Opening sentence. <line break>
paragraphs
[h3]
Opening sentence. <line break>
paragraphs
[h3]
Opening sentence. <line break>
paragraphs
[h2]
Opening sentence. <line break>
paragraphs
[h3]
Opening sentence. <line break>
paragraphs
[h3]
Opening sentence. <line break>
paragraphs
[h2-summary]
Opening sentence. <line break>
paragraphs.

* The reason to start with introduction is to have a briefer for the reader + create a space between keywords in H1 and H2.
* Line breaks are pointers and make it easy for the reader to follow the subject.

Using the above hierarchy not only improves your search engine optimization, but also adds to the accessibility of the page by the readers.