What are the most effective remedies for Pitra Dosh?

Effective remedies include performing Shraddha rituals (especially during Pitra Paksha), Pind Daan (offering rice balls), Tarpan (offering water and sesame seeds), Pitra Dosh Nivaran Puja, Narayan Bali Puja, Tripindi Shraddha, feeding Brahmins, donating food/clothes to the needy (especially on Amavasya), worshipping Lord Vishnu or Lord Shiva, chanting specific mantras (like Pitra Gayatri Mantra or Maha Mrityunjaya Mantra), and respecting elders