We all know SEO is separated into to types of SEO: Onsite SEO and Offsite SEO. Onsite SEO is the optimization of the actual website to make them more search engine friendly. Offsite SEO is the optimization that takes place everywhere else BUT your website. This is more complex than onsite SEO and also more time-consuming because it involves building links, or backlinks, to your website to increase your website authority. When building these backlinks, people focus on the quality of the backlink (what pagerank the backlink is, the niche of the backlink, if the backlink is related to your website, and etc). While this is obviously important to your SEO strategy, there is something that is often overlooked and as an affect, your high quality linkbuilding strategy is put to waste because you didn't properly plan out your strategy to include CONSTANT LINKBUILDING. When doing offsite SEO to your website, you are essentially telling Google, "Hey this website is receiving lots of attention from a bunch of related websites so rank this website better for certain keywords." Obviously this is just a speculation but I think this is somewhat accurate. So why do I tell you guys to not overlook constant linkbuilding? It's because if your website takes in a huge influx of backlinks at one time and no more backlinks come in, it will look unnatural to Google. The most natural SEO you can do is to provide a consistent amount of backlinks to your website over a diverse number of different types of backlinks (web 2.0s, social bookmarking, article submissions, link pyramids, etc.). Quality backlinks are obviously a huge part in SEO, but I believe having consistent backlinks ranks right under that. In my opinion, having a consistent bunch of low PR blog comments are more effective than a big amount of high PR backlinks, and no more ever again. The basis for all of this information I am throwing at you is from my own experience. I used many services that provided "high quality" backlinks and never used them again. I saw a small rise in rankings and then it just stuck at the second page. However, I stopped outsourcing my backlinking and started doing it myself. I started pushing in roughly 1000-3000 links a week consisting of mainly web 2.0s, social bookmarking, and article submissions, and soon enough, my position started to rise ever day. In about 3 weeks, I was ranking #2 for my main keyword, and 1-5 for my 10 other secondary keywords. My competition wasn't huge. Only 200k search competition in quotes, but traffic went up 300% from both higher rankings and the articles I submitted. Now it isn't bad to purchase high quality backlinks, but be sure to only have that as PART of your strategy, not your entire strategy.