Interacting in communities and forums is another great, not to mention free, way of getting SEO links that point to your website. Forum users are usually free to post links to their websites in the footer of their profile or posts. Just make sure that you're not spamming. You should contribute to the forum positively.
On the other hand, many forums have the "nofollow" tag, so those inbound website links might not help in boosting your site rankings. Nonetheless, while communities and forums may not help in your SEO link building efforts, they can help increase website traffic, especially if other forum users are interested in what you have to say.
