Stretch the time you have and use it to prepare yourself and consider what your opening lines will be. [substeps] Most of the time when you're giving an impromptu speech, you'll be singled out to say a few words on the spot.
[header] How to give a great impromptu speech [title] Take your time getting ready to speak. [step] Don't be in too big of a hurry to stand up or make the trip to the podium. Walk slowly to your mark, being relaxed and deliberate.