Khan Academy
Khan Academy: Webpage Design
Tips and tricks to making webpages look good include fonts, colors, whitespaces, and templates and frameworks.
Wikimedia
Wikipedia: Html
A Wikipedia description of the Hypertext Markup Language (HTML) specification.
Khan Academy
Khan Academy: Quick Tip: Selecting by Tag Name
In webpage design the CSS rule tells which HTML element to style by using selectors based on their tag names.
Other
Museum of Web Art
A fascinating site devoted to art and graphics used on the world wide web. Explore the best in buttons, banners, counters, and more.
Other
Web Style Guide, 2nd Edition
An excellent, comprehensive web site that lists each and every step in creating your own personal web page. The site breaks down the steps into eight chapters. A great resource!