I don't know SEO and I know how frustrating to get 1st place. I don't learn SEO because I believe that good links will get good back links. You don't need to build it. However, ever since Facebook allows you to put Like button at all over the web, not limited to Facebook, good content writers have another alternative to viralize their articles / websites etc.
Yesterday, sharing a link was a tedious process. You need to copy and paste somewhere, and then hopefully someone will do the same. Most link failed to viralize because most of us are lazy to copy and paste and continue copy and pasting others' stuff.
Facebook has eliminated this and simply all the steps with just a click! With one click, your friends will get notified and if they like what you like, they will continue to click like and then his friends will continue doing the same.
Sounds easy but here's the catch, your link will go down as users post new statuses. In SEO, your link will be there for a long period of time. So your post must be really good to make the link chains continue.
But once somebody like your link, expect huge click through because it is a personal-somebody you know recommendation. Friends as well as stalkers have higher tendency to visit the link.
If SEO fails you, try Like. I try this for a while and the increase in unique of visitors per day (not $$$) is amazing!
Get your like here : http://developers.facebook.com/docs/reference/plugins/like