[c0110]

I found that mock interviews helped me to some degree with this. It's hard for me to talk and write code simultaneously, so practicing in front of someone who is an experienced interviewer helped me gain some confidence in whiteboard coding.

[wavesounds]

That makes sense. I think its the talking while thinking/writing part thats hard. When I'm around strangers I usually want to fill the silence with some kind of conversation, silence feels awkward, yet I need to allow myself time to think.

[c0110]

This is exactly how I am. It takes a little practice to balance out the silence with speaking but when you find your comfort level, you'll be ok. :) I've told interviewers something to the effect of, "Sorry, give me one second to think -- it's hard to interleave my thoughts and talking aloud" and they were really ok with it.

Good luck!