just look at your surroundings when your on the phone i can always keep a conversation going that way for example: do you like such and such cologne, boy what a nice day outside do you like this weather. I did nothing today what a boring day or i watched this on tv today just talk about everyday stuff thats what i do. The tricky part for me is getting the balls to make the call.
Don't give up. I caught your post earlier and I agree with shyvr6. Ask her if she wants to hang out. Figuring out what to do when you hang out is the hard part. Hopefully she has some ideas. If not you could always go somewhere and grab a bite to eat, or hang out and listen to music/watch movies if you are into the same stuff, or go somewhere for a drink..I don't know I'm just throwing things out there.