There are many ways to build traffic to your website. I can suggest the next big players:
1) Facebook where you can build a fan page and invite targeted fans to it.
2) YouTube (this one is my favorite) - create a video from an article, order some backlinks from Fiverr to it and watch the magic ;)
3) Niche related forums. Google for *your niche* +forum and register on the major forums from the first page. Do some useful postings, help people etc and then put a link to your signature.
Well, you can also use some software
like senuke, scrapebox, xrumer etc but manual work is always better.