First of all, the URL in your description does not seem to exist. maybe there is an error somewhere. Anyhow... Here's what you should do:
- perform a keyword research in your niche and find out the most popular keywords
- browse the forums, go to yahoo answers etc. and try to find out the most burning issues that people in your niche are facing
- write articles around the main keywords and problems in your niche. Add content to your site on a regular basis
- build links to your site steadily. Look for blogs in the health niche that accept guest posters, distribute press releases, bookmark your pages etc.
- do more videos
- rinse and repeat. again and again, over and over.
Once you have a list, use it without abusing it. Send valuable content to your list and promote products.
Good luck!