Best way to talking to a girl over the phone?

A few days ago I have talked to this girl, that I am trying to hookup. I ask her a few questions, such as age likes or dislikes, background. but I need to get conversation keep going more than 20 Min’s. I get stuck on saying thing, sometimes I don’t know what to talked about. can anyone give tips or advice on this. Is a good web site that have self help about. Thank You.

Talk all about your massive penis, that keeps a girl on the phone.