Link building is an important part of the whole seo process, if you want targeted traffic coming to your website.  Have you considered such sites as Squidoo and Hub Pages?

What are they I hear you cry!  These are websites where you can publish information, almost like a mini-website, where you don’t have to worry about the hosting fees, but where you can still help people learn more about your business, hobby, ideas, thoughts …

But how does this help my business seo?  It seems counter-intuitive to have someone go and look at something that is not on my own website.  By creating information with a link back to your website, you are helping people to consume your message and also encouraging the search engine spiders to visit your main site.