As much as I've tried to stop, I say "ummm" while I speak. It's a terrible habit. The more nervous I am, the more I use it. So I'm currently practicing interviewing and I've found myself to use it more than ever. Like even if I've memorized the response, I still manage to say umm then say a few words and say umm again! This is while I do mock interviews with family and friends so I can only imagine how it'll be with complete strangers! Any advice???