I am having a firm with four staffs for doing directory submission service.So what are the different methods for marketing my services.
Your best bet would be to find a bunch of webmaster forums and advertise there (according to the forum's ToS, ofcourse ). Don't underestimate the power of smaller forums though -- you'll find that they are much more likely to buy from you when you don't have to compete with 20-odd other submission services, as is the case here on DP.
Absolutely, but you'll have A LOT of competition. The keyword "directory submission" returns over 20 sponsored links so I'd imagine that the CPC would be quite high. There is a webmaster forum list somewhere here on DP. I'll have a look around for it and get back to you. EDIT: Here it is.
There are dozens of people offering the service, and at the lower price.. 3-3.5 for 100 submissions. I am asking you to undercut the price, but have a more unique service, like more manual than automated, where you just push the submit button on a 4-5 different descriptions and titles.. And maybe find out deep link directories and offer that as well.