On presentations...
During the actual presentation beware of your natural human nervous tics. Don't:
jingle coins in your pocket
snap the pen in and out
fiddle with the laser pointer or remote control
scratch your nose 1000's of times
fold, sort, jumble your papers
jam your hands in your pants pockets and leave them there
Walk around while presenting, i.e. don't stand and deliver. Walk all over the stage, around the boardroom. Audience interest and participation will increase if you stand in front of the desk / podium. Talk in a slightly louder than normal voice.
Like the others say: know your material and practice.
You'd figure making a public speech would be a regular stunt on Fear Factor!