Develop your perception, production and understanding of the various states of the glottis by practicing all the phonation types in initial, medial and final positions:
 

Some real words to practise (note that the acute accent indicates high pitch):
 

Audio examples:
 

1. Glottal stop		Arabic ‘asked’		saʔala
		Hebrew ‘light’		ʔor
2. Creaky voice		Mazatec ‘buttocks’		ndǽ̰		vs. plain voiced ‘seed’			tʰǽ
3. Breathy voice		Mazatec ‘horse’		ndǽ̤
		Dutch hoed ‘hat’		ɦut
		Hindi ‘brow’		bɦɑl		vs. plain voiced ‘hair’			bɑl
		Hindi ‘knife edge’		d̪ɦɑɾ		vs. ‘lentil’			d̪ɑl
		Hindi ‘bundle’		gɦɑn		vs. ‘cheek’			gɑl
4. Whisper/voicelessness		Japanese くっ付けました kuttsukemashita ‘pressed-attached’		kɯ̥tːsɯ̥̥kemaʃi̥ta

The Mazatec examples were downloaded from the UCLA Phonetics Lab Archive. The other examples are from a database of audio examples relating to the IPA Handbook.