Read Strunk and White -- the points made regarding the reader are equally valid for the user. It's always about communication, and always about reaching for common ground with the person who you wish to communicate with.
Read Marshall McLuhan -- he foresaw the issues and challenges of everything we are trying to do on the web, though he didn't know what the web would be. All media is media, and as designers we mediate it for the users.
Read William Goldman -- it's always about telling a story and nobody knows story better than Goldman. He'll teach while telling stories about stories, and he'll warn you about the people (usually in a position to act as gatekeeper) who will try their best to turn every story into something else.
Read before you write.
