[This is another guest post by a reader who as been there from the very beginning - about two months ago. You too can send a guest post hit up the comment links below.]
This fits in with the post about Gladwell writing out his entire talk and then memorizing. He basically practices a lot before speaking. The following tip came from LifeHacker and was written by Alex Croft. His overall idea is that if you know your talk well then if something goes wrong you can still make the talk stick. His intuition is to practice this by having someone remove a random slide (or note card) form your presentation - can you still get through it without going through the Uhhh ohh Umm - or giving the AV guys the Neck Crane? (Seriously if you don't now what the Neck Crane is you need to click on that previous link). We have all been there where the video will not play on the powerpoint, or that codec which you tested a hundred times before the talk will not work, or the mic go off - but if you practice it ahead of time you can make it stick.