4. Post in forums and have a link to your site in your signature.

How it works: Whatever Page Rank the forum has is sometimes (depending on a few factors) shared with the links users place in the body of their posts or, to a lesser extent, their signature text links.

Pro: Free. Very easy way to get backlinks. You set your signature and you forget it. The more you post, the greater your links proliferate. Good addition to a daily linkbuilding routine if you visit and post on forums habitually. Some direct traffic.

Con: Link value is diluted by the tons of other links posted by other users. Signature-based links carry less weight than ‘in content’ (in post) links. The value of your backlink is greatly affected by how closely the forum you’re posting on meets the content category of the site you’re linkbuilding for. Also, many forums are now using NO FOLLOW tags for links, in post links, or both.