Let me present the humble Title Attribute for your consideration. This hard working attribute is a member of most HTML nodes, but is hardly used. Its syntax is easy and is very similar to the ALT attribute TITLE="TAG TITLE" and even has important ramification in SEO, but even so it is still mostly forsaken.
Lets take the example of a actual backwards link. We all want backwards links right? In the backwards link we have a page with its title element set to KEYWORD. Now on our Linking page we have KEYWORD in context being used multiple times, we have even Bolded it in the text to make it more important. We have set the ALT attribute of some of our IMG tags to have KEYWORD in it. We have made a hyperlink and the inner Text of our hyperlink to have KEYWORD in it.
So from an SEO standpoint we are finished with the page right? I respond with NO. Not yet, to get the most out of that link, to get that link to be most likely to be a backwards link, we need to set the TITLE attribute of that hyperlink to KEYWORD, we Should also change the header to an H1 tag and set the TITLE attribute of the H1 to KEYWORD, for Optimal link searching.