The night before I can't sleep. Five minutes before my hands are shaking.
Public speaking - no matter how many times I do it - still freaks me out. Especially when speaking on a topic where there are others in the room who know significantly more about it than me (which is all the time).
Five minutes before the talk I ask myself the question:
Will you die?
It's my way of reminding myself that even if the worst happens during the talk - I'll survive. Even if I forget everything I'm supposed to say, and the powerpoint slides have been replaced with pictures of hairless cats - I'll still survive. I may make a fool of myself, but the chances are good that I won't.
It's a phrase I picked up from a friend in improv a long time ago, and it's helped me overcome the nerves behind public speaking (and a lot more) ever since.