Best Link Building Practices to Avoid Over Optimizing

[SEODinosaur]

With all the new over opting talk, one of the things mentioned is having the same anchored text linking to a page over and over without variation. Is there a good estimate on how many external linking in keywords should be exact versus how many should be in variation? Also, keeping value of pages links in mind. Would it be best to use [Exact] phrase for the higher PR sites or more relevant higher traffic sites? and save the long tail or keyword variation text for the lesser valued sites.

When to use exact phrase and when to long tail is my question/discussion

I always stay relevant in my link building, and all my links are liking within context. Because I know that relevancy has been an important factor. After watching this video from Matt Cutt's http://youtu.be/KyCYyoGusqs I assume relevancy is becoming even more of an important factor.

[Sean_Dawes]

It really boils down to linking what makes sense. Do not write trying to get exact match anchor. Also keep an eye on your % of anchor text. If you have 20% of your followed backlinks be a specific head term, that is a no no.