Although this blog is still 2 days old I made, but it's been quite SEO friendly because the blog was getting the support links from hundreds of sites , including backlinks from all my blogs in free7 network.
Where can you submit nowadays when directories have less and less value? You can press submit on blog comment forms. It looks very similar and even does not take that much time. Many people still recommend commenting on dofollow-blogs that is blogs that do not add the "nofollow" attribute to comment links.
Just a tips from me, in anywhere's dofollow-blogs , don't add links into the body of your comments, it will be deleted before the fertilizer cools. Only a few of us keep some of the comments that have keyword anchor text links. If you have written your about page well, it will link out to many of your money pages. If you have written a truly good comment and if you are one of the first to comment on that post, the Do Follow Blogger will keep your link and you will see traffic directly from that comment for a long time to come.
Because dofollow links in comments get discounted as well , So use Dofollow blogs wisely and simple to say, make yourself as an SEO expert not a spam expert.
Related : Free Backlinks Generator