Three recent link building articles have appeared on Sphinn that are worthwhile for link builders. I'll walk through each of them and explain why they are important.
In Squeezing the [Link] Juice out of Low Hanging Fruit, Bob Massa talks about how hard work pays off. He emphasizes many points but stresses that you should carefully select quality directories to submit to and submit properly. This way, you don't have to pay for links.
Matt Cutts wrote a post with SEO advice on links in 2005 and published it on the 11th. He suggests that you should become a resource, provide an ongoing service, be valuable, and keep your product open. Quality content breeds links naturally. If you think about it, has much really changed?
Another post is Loren Baker's explosive organic and paid link building tips. In this post, Loren says that you should aim for relevancy, selective anchor text, and says that you should not be concerned about nofollow. Sometimes, he acknowledges that you may have to pay for those links and you may want to take advantage of new sites to build your links on. It doesn't hurt and they will eventually age.