There's a lot of Free Directories scattered in the WEb... Some requires reciprocal links but i prefer to submit my blog/s in regular links only... hehehe.. LOL Just be patient in waiting for the results of your submissions... Some approve your site in just a couple of days, some weeks and some 1-3 months...
I don't think that self promotion is allowed here ! Be Careful. I agree that Directory submissions is one of the best methods to secure some cheap backlinks.