Nasal strips are worth a shot too, if nasal airflow is a problem (eg nasal valve collapse or deviated septum). For sleep apnea, I think there was a post on HN

Nasal strips are worth a shot too, if nasal airflow is a problem (eg nasal valve collapse or deviated septum). For sleep apnea, I think there was a post on HN recently that recommended trying a mandibular advancement device before trying sleep masks.