The Best Inbound Links

The bestmeaning most likely to drive trafficinbound links come from:
Sites that publish content that is complementary and related to the content on your site
Hub sites that are a central repository, discussion area, and community site for a particular interest group (for example, a mention on SlashDot [http://www.slashdot.org]) can drive huge amounts of traffic to sites related to technology, so much so that the phenomenon of a sudden uptick in traffic due to inbound links has become known as the "Slashdot Effect"