This is a very simple technique that is free – just say nice things.   Here is how it works:

Search for blogs, forums, articles, myspace profiles, reviews, etc.   If you find something you like, just say so.  In your signature include a link and a reason to click it, back to your site.

Here are a few places that you can search for places to post links:

• http://google.com
• http://wikianswers.com
• http://ehow.com
• http://einzearticles.com

The important thing to consider is not to use blatant self promotion.  Don’t just speak to speak.  Be helpful, honest and sincere.