Check out the inimitable Seth Godin's new ebook Knock Knock which tells you "how to use the new online marketing tools to make any website work more effectively." It's a 6 meg download, so be prepared if you're on dialup.
Great no-nonsense advice in the book. Tip: Look at your own site in the light of page four. Does it measure up?
And what do you mean, you don't have a Web site? Start a blog. A blog makes much more sense for time-poor and cash-poor writers.
If you're trying to work out what to put on your site, here's my article "Your Creative Web Site", written way back in 2003. (One point -- the article mentions the DE forum, which is no longer extant. We deleted it when the site was revamped.) You can however get help on Pro Write's forums.