It teaches to speak in a different manner than the one we do naturally(it's supposed to bypass the defective speech pathway that we stutterers have) Some general things common are - stretching of all vowels or stretching first syllable of word only (during stutter, the speech muscles/vocal cords become tensed, so it helps to keep it relaxed, hence helping with words coming out smoothly) - diaphragmatic breathing is also common, and one needs to take breath in and speak on the exhale (generally shorter sentences then breathing again diaphragmatically to speak shorter sentences etc) I think these 2 might be common ones (at least the ones I know commonly.