I picked up Elizabeth's first edtion of this book, HTML for the World Wide Web, back in 1996. I still use it whenever I need to look up a specific tag or the code for a special character. From page 24 of the sixth edition - “The first edition of the book, published in 1996, had 11 chapters, 2 appendices, and just 176 pages. The sixth edition has 25 chapters, 6 appendices and more than 450 pages. This book has expanded and adapted as (X)HTML and CSS have grown and changed.” (But it still has photos of places in Northampton!)
Like all Visual Quickstarts the index is extensive and well thought out. Work through the book to learn, but keep it on your shelf to quickly reference the stuff you've forgotten.
Explains the problems associated with using an email address that's not in your control, and how to avoid them.
Explains the difference between the two and how to avoid surprises on press or with electronic media. Contained within the typesetting & print resources of this website, but includes some information relevant to web designers.
Very basic examples give you a feel for how the different tags work. The try-it demos are incredibly useful, giving you a side-by-side view of code and the result, and letting you edit the code to try different things. Highly recommended reference tool.
Again, the examples are basic, but you can edit source code (and try more complicated things) and see the result in a side-by-side window. Highly recommended.
Some good design ideas, plus lots of examples to look at
Very tongue in cheek site that not only shows bad web design and navigation, but explains why it's bad.
A more academic approach to web site and navigation design. I have been unable to attend any of their seminars or workshops, (but wish I could!). I do subscribe to their newsletter.