Don't rant.
Don't prate.
Don't fidget.
Don't flatter.
Don't declaim.
Don't be glib.
Don't hesitate.
Don't be nasal.
Don't apologize.
Don't dogmatize.
Don't be slangy.
Don't antagonize.
Don't be awkward.
Don't be violent.
Don't be personal.
Don't be "funny."
Don't attitudinize.
Don't be monotonous.
Don't speak rapidly.
Don't sway your body.
Don't be long-winded.
Don't "hem" and "haw."
Don't praise yourself.
Don't overgesticulate.
Don't pace the platform.
Don't clear your throat.
Don't "point with pride."
Don't tell a long story.
Don't rise on your toes.
Don't distort your words.
Don't stand like a statue.
Don't address the ceiling.
Don't speak in a high key.
Don't emphasize everything.
Don't drink while speaking.
Don't fatigue your audience.
Don't exceed your time limit.
Don't talk for talking's sake.
Don't wander from your subject.
Don't fumble with your clothes.
Don't speak through closed teeth.
Don't put your hands on your hips.
Don't fail to stop when you have ended.