Add document declaration at top
strict: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
transitional: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Add Latin character set declaration to header
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
Replace attributes (e.g. align, type) in tags with CSS classes
Enclose <br /> tags within <p> tags
Remove navbar arrow icon
Replace font tags with span tags
Add "id" to fragment identifiers and put them inside paragraphs or headings
