Make the deadline, fill the brief. While there are some things I like writing about and specialise in - mobile data and smartphones, Tablet PCs, Microsoft Office, Windows XP and Vista, nifty tools and services on the Web - I write on a very wide range of subjects. If it engages my attention, I like writing about it. That means when editors ask me what I specialise in, I'm tempted to say "good writing, delivered on time and to the brief". Writing to Deadline is about more than that, but the basics never hurt.
Talking of basics, the Wired stylesheet seems to have gone the way of the dotcoms, but A dozen online writing tips has some good pointers. And of course there's always the standards.