Email Campaigns

What are the best marketing techniques for an inside sales guy to generate prospective leads for IT Infrastructure Management Services(IMS/RIM)?

I’m an inside sales person working with Calsoft IMS (www.calsoftit.com). Calsoft IMS is a division of Calsoft Labs (an IT services company based in Chennai, India) and is a newly started (one year old) business division. We have just 5-6 companies as our clients and looking to expand our business in USA. As an inside sales person, my role is to generate qualified prospective leads through email-marketing and tele-marketing.
My current marketing techniques involve
- Extensive email campaigning
- Tele-calling and
- Virtual seminars (Webinar) for our RIM and VMWare solutions.

Please suggest me some more methodologies/techniques through which i can achieve better results and conversions. Through the above mentioned marketing activities i’m not able to achieve self-satisfying results. every input from sales people who are in the IT Infrastructure management industry will be very helpful.