Some miscellaneous tips

page ids

id each page in your document, preferably in the body tag, for easy control via CSS.

Alternate between <divs> and <sections>

This can make it easier to see the priorities inside your code. The Web Consortium (W3C) recommends using div for the higher-level divisions and section for the subsidiary sections. Some popular frameworks, such as bootstrap, rely completely on div and class, which makes their html almost unintelligible onscreen. So I advise:

Comment your </div>s and /<section>s

This can make your structures easier to navigate and comprehend. I try to always end my divs with a <!-- /[class] --> comment tag.

Next: Contents

/body>