When I started working as a consultant in the latter half of the 90's, our firm had writers that specialized in writing for the web. These folks constantly had to help clients refine and organize traditional print copy for the "new" medium.
Recently, Jason Fried over at 37Signals published a short blog post that referenced a post by Maria Popova at BrainPickings.org highlighting writing advice from David Ogilvy, the original "Mad Man." What I found fascinating is that the advice that Ogilvy delivered in 1982 is much the same advice our writers gave clients more than a decade later (in the context of writing for the web).
Clearly, good advice never goes out of style.