Yeah. Pick a subject and write about it.
This is a pretty vague question, and considering you call yourself "creative", it is sort of unexpected. Writing web site content shouldn't be something that needs guidance, unless you are talking about rules and guidlines for writing on the web in general.
Coming up with content is pretty straightforward: write about what the topic that you wish your web site to convey and make sure you don't rip off anyone else's work (pretty easily, really).
As for publishing said content, just make sure it is (mostly) proper english and is grammatically correct. Avoid dumb typos. Don't type like you would when you instant message. n0 txt speak plz.