The Document Sharing Site Strategy:
1. The First thing you need is articles to do with your niche, so if you are for example doing the make money online niche then you would write articles on traffic, blogging Etc.
2. Once you have written your article you need to make sure you have a call to action in the middle and bottom of your article. Also add pictures to your articles linking back to your capture page/sales page.
3. The third step is you need to turn this article into a PDF document. Once you have done this you need to upload your PDF article to the top document sharing sites which are below.
You want to sign up to most of these document sharing sites to get better results. I personally use Slideshare and Docstoc so start with these 2 first and get started right away.
I hope this helped, to your online success