Tarpan: Offering water mixed with sesame seeds to ancestors while chanting specific mantras. This is believed to quench their thirst.
Shraddha/Pind Daan: Offering Pindas (cooked rice balls mixed with ghee, sesame seeds, and barley) to ancestors. This is believed to nourish their souls.
Feeding Brahmins: Offering meals to qualified priests is considered equivalent to feeding the ancestors directly.
Charity (Daan): Donating food, clothes, and money in the name of ancestors.