One thing you should remember when giving a public speaking event is whether or not your audience is from the same background or level. If you have a group that includes various positions, from the mail clerk, to the person that scrubs the floors, to the CEO jetting off to Rome on the company’s bill, there are a variety of interests and perspectives in one small space. You have the difficult of entertaining each one!
When you do your preplanning before the public speaking engagement, take this into consideration. Instead of sticking on one topic, bounce around, add variety, keep things interesting. Otherwise if you plan your entire event to, say the upper management, you’ll alienate all of the other position levels in the room. This will result in a bad water cooler review! No one wants a one-star public speaking review, so keep it light and versatile!