BTW, I am convinced that this probably is by far the best (and easiest) way for someone to ramp up and serve documents via WWW, so it should come as no surprise that I have decided to put this at the front of the list of HTML resources.
For a beginner's guide to HTML, I would recommend looking at NCSA's HTML Primer.
Once you are through with the basics, I would then recommend a slightly more advanced treatsie by James "Eric" Tilton called Composing Good HTML which focuses on traps, common mistakes, obsolete elements, and things to avoid.
Finally, you're ready for the big one, the CERN's style guide to HTML. This gives complete information on style issues in HTML documents.
Not to toot my own horn, you can certainly crib off of my style, which I consider pretty clean (and compliant with most of the above guidelines).
By all means, Look at other peoples' pages too! Here's a hint: Mosaic/Netscape will allow you to view the source file for a page you really like.