Hi Sujai!
It depends on the budget you have for marketing and advertising your site.
Free methods:
Submission to SE's and directories
Email campaign
Forums, blogs and board postings to targetted audience
Social Bookmarking
Offline campaigns
Etc. etc.
Premium ways: (Should require a budget)
Pay-Per-Click (PPC)
Targetted Link backs
SEO
Ad spaces
Etc. Etc.
Just always keep in mind that patience is a virtue in our industry
Hope my suggestions help out.
Goodluck!
Pm me if you need more advice...