Originally Posted by fonsolo

Create posts that contain links to your site within them on FB, Twitter, Tumblr, etc and do your best to get them shared by others. Although the initial link is normally "no follow", the shared link works as a backlink.

Paid traffic is often not worth it and may even be harmful to your SEO efforts as most isn't quality and have high bounce rates. Most people who suggest Juicy Ads and Plugrush then provide a link in there comment or signature are actually trying to make a buck off of you for signing up for said services through affiliate programs.

If you are looking for productive traffic, your best hope is SEO. There are numerous threads on this site and elsewhere about it which I would encourage you to read into.

Good Luck!