If you don’t have a lot of money, but really think you have some good insights to share, these free directories are a great place to go! I also recommend Google and Blogspot of course. Take a look at these terrific sites! 
www.dmoz.com
www.itzalist.com
www.gmdir.com
www.araknelinks.com
www.clickey.com
www.mavicanet.com
www.smartlinks.com
www.topsites.com
www.illumirate.com
www.searchsight.com
www.netinsert.com
I found this list on: http://www.strongestlinks.com/directories.php
