It appears that with the last wave of Google updates, tired link building really doesn't work as well as it used to. Some people say it's still worth doing (Like Pat from SPI), but I don't want to waste my time if it doesn't. I currently own 3 successful niche authority sites at the moment and I'm in the process of building a new one, but I'm not sure what works these days. It's been 7-8 months since I built links to a website. Thanks!