Well, it's important to mention that the nature of websites promotes hyperlinking, a technique which is impossible in a linearly progressive novel, for example. If you haven't used hyperlinks, why not? What differentiates YOUR medium from others?
The idea of a fragmented website is important because it shows two intrinsic elements of the WWW: that a website is never 'complete' and that the 'hyperlink' is one of its defining traits. If you're just going to write textual pieces and stick them on the web without inter or intra linking, then you're not really creating a multimedia website per se, you're just putting text on the web (ok, this is a slightly biased opinion)
Oh wait. I just read your first post again - I thought you meant 'how do I write ABOUT my website'; my mistake. But I like my ramble above so I'll leave it
Anyway...
USE HYPERLINKS.
It's the most obvious, most practical, and most defining trait of websites. It cuts out overlap. It allows EXTERNAL (this is important) linking - it is a GLOBAL web, not just an INTERNAL one.