As others have said a fine summary.

To follow up on the comment from graff (and also your <br/> comment). You post did render oddly in my (admittedly old) browser, personally I would have added a statement like:

• Your HTML will look better in a wider range of browsers if you follow the strict XHTML rules, that is always open and close tags (e.g. use <p>Paragraph Text</p> for paragraphs, <li>Item Text</li> for list items and <br/> for breaks).