How can i develop the gift of gab?

How can i become more articulate and develop the gift of gab. My conversations dry up and that awkward silence develops eventually. However, when I'm writing or texting I have no problem expressing my thoughts. I'm thinking maybe I get distracted because I dont like my voice or I'm thinking about how the person I'm talking to perceives me. Or maybe its because my wit is a bit slower and I take time to think before I speak. Any tips?