As you most likely have heard, the Penguin update was all about the links that point to your site from others (some of them may be bad links). The problem is you can’t really control all your links (the ones that you got in a natural way), but you need to do whatever possible to tweak the links you have control over. The interesting – and obvious for that matter – thing is that you need to keep an eye not only on the sites that you get links from, but you also should monitor the percentage of your anchor text exact match keywords, because this factor can drastically influence your keyword rankings. And that’s exactly what I’ll start from.