Inside Sales

I have am working on defining my lead generation method. I am working creatively to network and drive business through referrals. I am talking with professionals who do something similar and would be able to refer business. I am also starting a direct mail and canvassing campaign(door hanging). The next step is inside sales. Since I am starting this up myself I am all of the above for right now. I have started to generate a list using: www.infousa.com and www.insuranceleads.com. I have only received one lead so far who did not pick up the phone. I have not received the list from infousa. They will provide a bluk list for me to go through and call. I have started to call from an exhisting list I have. There were 150 names on the list and I talked to 40 people, 5 hang ups, and only 3 were interested. I am going to continue calling this week to determine what is the best response rate and at which times. I am being perssitant and trying not to take any of the sales process personally. I do however want to overcome objections and make more sales. I am currently in the process of determining what the objections are. I will then sit down and make goals and statements to overcome the objections. More news as I continue this week. Any experience with Inside Sales?