Here is a link to a short article that explains why one nostril can get stuffed up while the other one does not. If nothing else, I now know that it’s not exactly my fault.
Next is a TED talk titled “How I beat stage fright.” by Joe Kowan. I remember when I first had to speak in front of a guild. I was president and I was scared stiff. No, I was scared ‘nauseous’, which was worse than being stiff. I wish I had been able to watch this then. As it is, even though I am not usually nervous in front of a crowd now, I did pick up some useful tips.