Today, I read a cool post in SitePoint.com forums, the writer of that post said that the most traffic that come to her website are coming from her signatures in forums and of course her regularly activities.
She said that the best way of getting targeted traffic is simply adding links in your signature area and posts everyday new and good threads or answer the other members with helpful answers.
She is using some high quality forums to post there, she is posting in SitePoint.com, Forums.DigitalPoint.com. She keeps writing everyday for 4 hours after working and she writes during the whole day during the week end. Read the original post.
Why she gets high amount of traffic from only forums signatures, because when you post a helpful posts or you answer other member and solve a part of his/her problem, the all readers will be more than willing to visit your website that located at your signature are. This is the magic of forums signatures.
Write helpful posts, add your link at your signature are, receive some high qulaity traffic to your website. This method will also increase your website rankings in search engines.