I have been doing directory submission for a while. But i couldn't get any links out of it. Can anyone help me on this?

I do not think that directory submission makes any great impact on ranking unless it is of high-quality.

Directory submission basicaly is used to improve the traffic of business. Now its use is rarely used. Because the Directory of Free Off Cost takes 2 Months Time to be Approved. And instant directory sites do not even have good effect.