Consider yourself honored if you are asked to be a program chair. It's a showcase for you. It will do more for your stature and visibility in your company than six months of normal work.
Use the TEAS formula when introducing a speaker. It's simple and it works. The introduction will be livelier and the speaker better launched.
Hold the name for last when you introduce a speaker or present an award. It helps build anticipation. The audience will applaud more enthusiastically.
Punch the name with gusto when you announce the speaker or the award winner's name.
Use the person's name ten or fifteen times in the course of the introduction. This strips all drama from the ending.
Talk too long. You are the preface, not the book.
Try to steal the show by being a comedian or by seeking undue attention. Not your job. There's a place in heaven for a good emcee. Most comedians never get there.