Five ways one should minister to one's parents:

• Having supported me, I shall support them.

• I shall do their duties.

• I shall keep up the honour and the traditions of my family.

• I shall make myself worthy of my heritage.

• I shall make offerings dedicating the goodness of my practice to my parents after their death.

-- The Buddha (Sigalovada Sutta: Digha Nikaya 31)