Speak politely and pleasantly

As you speak make sure that you do not speak at the top of your voice. You should be audible and clear. Remember that you are participating in a discussion which is different from a speech given out by the leaders in their rallies. Even if you disagree with the other?s point of view, disagree politely. Use phrases like, I would like to disagree a bit here, I am sorry but I think I have a slightly different point of view here.