1. Brahma Yajna: The study and teaching of scriptures.

to repay one's debt towards the Brahma and the Vedas.

2. Pitri Yajna: water and other food items are offered to the dead.

This is to pay debt to our ancestors.

3. Dev Yajna: Ghee and other items are offered to the deities.

This Yajna is performed to pay homage to family deities.

4. Bhuta yajna: the offering of food to the animals and the living beings in general

This consumes one's past negative karmic reactions related to food and drinking items.

5. Nri yajna: the regular practice of charity, compassion, tolerance and forgiveness towards other human beings.

This sacrifice is essential for love, peace and happiness in the society.