A little trick to start a sentence.

A little trick to start a sentence. I've recently started this and it seems to help every now and then. If I start saying "hmm" under my breath to where it's hard to hear, it kinda alleviates a block that I'd get almost every time. It may sound weird if the other person hears it but it sure as hell beats a block. Another one that I use to start a sentence is "Let's see.." because it appears to the other person that you're thinking so logically there's going to be a little silence. Anyways, give these a try. Maybe it'll build a little confidence and gradually start working more and more.