Yes, certain rules enhance the sanctity:
- Purity: Take a bath (preferably in the Ganga) before the ritual. Wear clean, simple clothes (often white dhoti for men, simple saree for women; new unwashe,d clothes are sometimes specified for rituals like Tripindi Shradh).
- Diet: Maintain a simple vegetarian (Sattvic) diet on the day of Shradh. Avoid non-vegetarian food, onion, garlic, alcohol, etc., during the Pitru Paksha period if possible, or at least on the day of the ritual. Some observe fasting until the ritual is complete.
- Conduct: Maintain a solemn, respectful, and devotional attitude throughout. Avoid arguments or negative thoughts.
- Hygiene: Traditionally, shaving and haircuts are avoided during Pitru Paksha until the Shradh is completed.
- Family Participation: Ideally, the eldest son performs the rites, but other male members can participate. In the absence of male heirs, women can also perform Shradh.