Google knows about ranking with directories.
If your website diet consists of mostly directories alone, you will be missing something.
Time to get listed on some blogs
(BPFS), mentioned in forums, listed on articles and
reviewed/mentioned among your peers.
Pressreleases also helps. Google
Pr is not worth anything. Concentrate on improving your rank by using White had and Black hat methods.
IMHO Black Hat is actually anything other than Adwords.