You can use the new HTML5 tags
<header>
<footer>
<aside>.
They work the same as a, but give more information to Google.
- http://www.w3schools.com/tags/tag_header.asp (Header)
- http://www.w3schools.com/tags/tag_footer.asp (Footer)
- http://www.w3schools.com/tags/tag_aside.asp (Sidebar)
</aside>
</footer>
</header>