“Links matter. No secret there. How much they matter, well…therein lies the secretive part of the equation. And as much as readers of this blog would love for me to slip up and say they account for N% of the equation, I won’t. The fact is, the actual value links apply varies based on other factors, so there is no solid number. Back when everyone was chasing “keyword density” as a ranking objective, everyone wanted to know what the magical percentage was. Same deal – it depended on a variety of factors. While keyword density has gone the way of the dodo, links continue to provide useful signals, despite the obvious spamming that happens. So let’s take a quick look at some ways to build links that you should avoid.”
“Google Trends is one of the best and most versatile tools available for SEO. It is the marketing equivalent of the Leatherman or Swiss Army knife. If you could only use one SEO tool to develop an Internet marketing campaign, this product would be a serious contender.”
From Google Webmaster Central, how to apply for reconsideration if you’ve fixed your spam backlinks.
Some of the most common mistakes marketers make when crafting paid search campaigns using Google AdWords.