Some good points worth noting, I believe most people have faced that pressure when in presentations.

#3 Reduce the perceived importance of the situation

Every time we perceive the situation as so important, it makes us feel uneasy.
We mostly tend to get attached to the end result, inside threatened of what may happen, which actually stops us from enjoying the presentations and presenting to our potentials.
One thing i always ask myself is "what's the worst thing that may happen"
This helps me to relax.
Otherwise thanks for this article, most people need such information.