Okay, so you've decided to join the WWWiki community. That's great! So, you may be wondering, "now what?" One of the great guidelines about any wiki is that you only have to contribute what you know or are willing to learn about — there's no assigned reading or assigned articles. Everyone is permitted to chose their topics and what articles they'll write themselves or expand.
That being said, contributors are encouraged to expand their horizons a bit, and try learning about a new subject in order to write a WWWiki article about it. Although it may seem a lot like research (real work — ugh!), learning about a new part of the White Wolf universe can often be quite enlightening and entertaining. So you don't have to limit yourself to your current interests. You never know, you might find a new favorite subject!
Ultimately, of course, the decision is up to you.
One corollary to this policy is that WWWiki strives for completeness — we want to cover as much information about White Wolf in as great detail as humanly possible. Of course, creating stubs is not always a bad thing, and if you create a really useful stub, that's definitely a good thing!
However, don't take this rule as a requirement that only complete articles be submitted — that's not the intention of the policy at all. WWWiki is a continuous work-in-progress, so stubs and abbreviated articles are always acceptable.
A useful rule of thumb is the two-sentence minimum. Whenever you create a new article that you don't know too much about (or aren't interested in writing), include at least two sentences before you press the "Save page" button. Two sentences is about the minimum necessary to provide good content that is at least minimally informative.
See also: Make omissions explicit — the two suggestions complement each other.