mother teresa gave these rules to her sisters to help them develop the virtue of humility:

speak as little as possible about yourself

keep busy with your own affairs and not those of others

avoid curiosity

do not interfere in the affairs of others

accept small irritations with good humor

do not dwell on the faults of others

accept censures even if unmerited

give in to the will of others

accept insults and injuries

accept contempt, being forgotten and disregarded

accept injuries and insults

be courteous and delicate even when provoked by someone

do not seek to be admired and loved

do not protect yourself behind your own dignity

give in, in discussions, even when you are right

always choose the more difficult task