How to take a vow of silence?

i don't know if it wound be considered one but i need to know how you do it when people are constantly provoking you. how do you discipline yourself and restrain from loosing your cool. I'm basically doing it to the people in my household only. as a suggestion from my boyfriend because everyday has been a struggle with fighting and bickering with them and me ending up losing my temper which i don't want anymore.