Internet Marketing

Internet Marketing

Free SEO Book

Here is a large list of third party content sites that you can use to build a large content network.  By linking appropriately and using a variety of media types and sites, you can really improve your placement in the search engines and funnel page rank back to your main website. 

Squidoo.com

Hubpages.com

Wuizilla.com

Scribd.com

Twine.com

Blinkweb.com

Weebly.com

Zimbio.com

Wetpaint.com

Slideshare.net

Ehow.com

Wikidot.com

Docstoc.com

Blogger.com

Wordpress.com

Livejournal.com

Vox.com

Blog.com

Tumblr.com

Clearblogs.com

Blogster.com

Thoughts.com

Youtube.com

Dailymotion.com

Video.yahoo.com

Blip.tv

Metacafe.com

There are many more third party content sites out there to utilize, but this list should give you a great place to start.  By building content directly related to your main site on as many of these platforms as possible, and linking back to your main site, you can create an authority "hub", basically a network of highly relevant and related sites, which will pass a generous amount of authority and page rank back to your main site.