Squidoo is a platform created by Seth Godin that enables creation of pages expressing the personal point of view.
The single page, called a 'Lens' contains of standard modules that allow to create a site within a minute ( providing you have a content ). There are text modules, Flickr photos, and modules that allow to sell items from Ebay or Amazon.
The lens could be advertisement of your website, but also can make profit by itself.
What is more interesting the pages squidoo tend to rank high in SERPs.
The featured lens Krakow Travel is a good example of huge potential
of Squidoo.

The great way of marketing and self-promotion is connected with designing web templates.
Very popular are free templates for Wordpress or Blogger.
They are relatively easy to create and usually in the footer designer places the link to his own webpage,
so besides the advertisement theme designer gets the free link, that counts in SERPs.
The more popular template, more links it brings to the creator.
Some unscrupulous people try to sell the footer link, and now you have three or four links to unknown places,
that is vere easy to be punished for by Google.