I've repeated advice given to me: speak so slow you feel silly, then slow down. This is great advice or large audiences. Speaking slowly ensures that the audie

I've repeated advice given to me: speak so slow you feel silly, then slow down. This is great advice or large audiences. Speaking slowly ensures that the audience can understand every word, even non-native speakers. More than that, large groups may be varying distances from sound amplification, meaning the only way to cope with the inevitable rumble/echo is to modulate slower than it. This isn't such a big deal in groups that are easily in ear-shot without amplification, but it will definitely help prevent the speech from turning into a race to decompress an idea fastest! And it also helps prime your style, so that when you inevitably hit your stride, it fails normal, not fast. Granted, if you have a strong command of yourself, then you needn't worry about it, but then you already have a style you're comfortable with and works.