Last march 2005 Google Update

Google updated there algo to get rid off Link Spam. We predicted this for over a year now, so you should be warned.

1. Avoid run-of-the-site links. These are links where every page of a site links to your Homepage. When you have, say, 1000 incoming links all originating from subpages within the same site, it appears to Google that your link count is artificially inflated.
2. Make sure that some of your links are Deep links — i.e., links to sub-pages within your site and other than your homepage.
3. See to it that your incoming links from off-site pages do not include the rel="Nofollow" attribute within the source code of the link; nofollow renders the link useless to your Ranking efforts because Google doesn't credit your page for having that incoming link.

This list was first published on SE news