Get ARIA roles backed into the HTML with semantic tags!

Big ones

<Main></Main>
<Nav></Nav>
<Aisde></Aside>

// then use sections, but it needs to include a title! 

<Section title="about"></Section>
use headers in sections!

Headings (h1-h6) are supposed to be used to create sections and subsections of content!
Use one h1 per page. 
Don't skip heading levels.
Think of it like table of contents. 

If you have multiple navigations, you'll need to label which one is primary. 

Rely on styling with your classes, not with your headings!