I probably won't be much help -- but I had to reply because your post title had me LOL-ing!
One thing I've been doing is asking questions in my head and saying answers out loud. Basically, talking to myself. You feel hella silly, but you know, all the great writers/editors tell you to read your work out loud and I think somehow this is related, yeah? Just get used to rambling to yourself. Listen to your voice: its quirks, its kinks.
Along the lines of yoga, sorry if this sounds super out there, but I once had a dance instructor always start out class with a series of moves that were about the elements or something. Anyway, the element that was supposed to keep us calm and grounded was--obviously--earth. Starting with your hands by your side and your feet spread shoulder-width apart, you jump and land so that your toes are pointing to their respective sides (left to left, right to right) with your knees are bent and your arms spread out, parallel to the ground. Err. I wish I could draw a picture. Hah! Hold the stance and concentrate on your breathing.
You're smart and know you're confident. It'll all work out.