Originally Posted by Rapture
AFTER you optimize your site, submit. Here is a link to a bunch of sites you can submit to. Strongest Links - Directory list
I have tons of other sites but you can easily find them by just searching the internet. There are many forums also on the subject of SEO.
There are a couple of directories I did not know about on that list. I would suggest everyone gets aquainted with that list of directories since the majority of them are rock solid.
Rapture if you have a list of any more sites to get back links from without paying please post them so all may learn.