Public speaking is hard enough for most of us. You've memorised, rehearsed and gone over it a million times in your head, but there is no guarantee those brilliant words of yours are going to flow out of your mouth the way you want them to. These exercises can help.
The first and most important skill you want to develop is your enunciation. Many of us have a tendency to mumble when speaking, and that can make you come off as less confident. In the video above, Howcast has a few tricks to help your diction when speaking and in turn develop confidence in yourself. The most popular form of exercise is usually a tongue twister with a variety of different sounds and consonants.
Speaking clearly is all well and good, but people also need to be able to hear you. Projection is also a major factor when speaking publicly. The second video above, also from Howcast, is intended for stage actors, but it also applies to speaking in front of groups of people. Getting up in front of others and putting yourself on display can be pretty uncomfortable, but with loose lips and prepped mouth muscles, your tongue could disarm an unwieldy swordsman. Work on these exercises and be confident in not only your words, but also your speaking.