Ekadashi Vrat & Dwadashi Parana Sampoorna Pooja Vidhi (Lakshmi-Narayana Puja)

From sunset on Dashami (the 10th lunar day), abstain from grains, dinner, and tamasic thoughts. On Ekadashi morning, bathe before sunrise with water mixed with a few drops of Gangajal and sesame. Wear clean yellow or white clothes, sit facing East, and take the sacred Sankalpa with water, Tulsi leaf, and flower in your right palm.

Place a wooden chowki covered with a yellow cloth. Set Lord Vishnu's vigraha or Shaligram Shila on a brass plate lined with Tulsi leaves. Perform Abhishek using a conch shell (Shankha) with pure water, Panchamrit, and Gangajal while chanting the Dvadasakshara Mantra. Gently wipe the deity, adorn with Pitambara, and apply Gopichandan or saffron tilak.

Offer yellow flowers, seasonal fruits, and sacred Tulsi leaves with Manjari at the lotus feet of Lord Hari. Depending on the month's Ekadashi (e.g., Lord Keshava and Maa Rama on Rama Ekadashi, Lord Trivikrama on Devutthana, Lord Damodara on Mokshada), chant the sacred names of Vishnu and offer grain-free satvik Naivedya (fruits, makhana, coconut, misri).

Read or listen to the specific Ekadashi Vrat Katha with folded hands. Recite the Vishnu Sahasranama or chant 108 beads of 'Hare Krishna' / 'Om Namo Bhagavate Vasudevaya' on a Tulsi Mala. In the evening, light a cow-ghee lamp before Lord Vishnu and near the Tulsi plant, and perform Om Jai Jagdish Hare Aarti.

On the next morning (Dwadashi), bathe early, worship Lord Vishnu, and set aside food/grains and Dakshina (Sidha) for a Brahmin or the needy. Verify that 'Hari Vasara' (the first one-fourth duration of Dwadashi Tithi) has passed, and break your fast within the auspicious Dwadashi Parana window by first taking Charanamrit and a Tulsi leaf, followed by satvik food.