I recently finished developing a job site that allows people(companies, agencies) to post their jobs, and users can reply and upload their resume's the question is how do I go about promoting a job site site, since I've noticed that this is a very saturated market, what I was thinking is contacting job agencies and have them sign up and post their jobs after all wouldn't they want as much exposure as possible? any comments ?
How about creating a Facebook fan page, Facebook pages can be powerful when used properly. Are you planning to earn your revenue from advertising? You may have to make the service free to start with, to encourage business.
Try looking at Your competitors and where they are advertising. If Your site is better than theirs, advertise in similar places as Your competitors.
You will need both online and offline advertising. I will advise you focus on offline advertising heavily because it is more productive and result oriented. Online marketing method will take time and also require branding. However, on the internet, you might want to consider optimizing your site and doing link building to get to the top spot of the search engines. It is vital to invest heavily on PPC, PPC does one remarkable thing. You know Google uses a lot of partners for advertising through things like ad sense. By using Google PPC, Yahoo, MSN, your site will be showed on almost all the big top sites of the world and that means a lot of visibility for you.
Maybe create "fake" users to saturated it at least a little bit. It will take a lot of work though. Maybe send emails to companies and ask what they would like from a job site as feature and what would make them join.
Social Network while lot of youngster and fresh graduate looking for job. And i believe when they jobless, they will view facebook more than job site. It a trend that people post latest job and part time job in Facebook and receive huge respond. You may try on facebook to reach those young people and if possible try collaborate with college and university as well. I believe that the best way to promote.