Then I started using joinme.com. It lets them see my screen. So after I make initial contact and they are interested in knowing more I schedule a time when they can be on the phone in front of their computer.
Before the scheduled call I open up all the browser windows I'll need (example google keyword tool showing number of searches, their bad reviews, or where they rank, their google places listings, sample websites I've done, etc. depending what I'm offering.)
When we start the call I have them go to joinme and they can see my screen. I then make the presentation showing the screens I want them to see and all they need to do is watch the sceen and we can discuss it. It works great because you control what they see and they don't have to anything technical. It really impresses them and you can lead them to the close.
If you aren't using this give it a try.