Srimad Bhagavatam 11.27.36-37 - The Yajna for Kaliyuga (download mp3)
by Radha Dyuti Prabhu at ISKCON Chowpatty
vidhinā vihite kuṇḍe
agnim ādhāya paritaḥ
In an arena constructed according to scriptural injunctions, the devotee should perform a fire sacrifice, utilizing the sacred belt, the sacrificial pit and the altar mound. When igniting the sacrificial fire, the devotee should bring it to a blaze with wood piled up by his own hands.
prokṣyāgnau bhāvayeta mām
After spreading kuśa grass on the ground and sprinkling it with water, one should perform the anvādhāna ritual according to the prescribed rules. Then one should arrange the items to be offered as oblations and should sanctify them with water from the sprinkling vessel. The worshiper should next meditate upon Me within the fire.
Śrīla Jīva Gosvāmī mentions that one should meditate upon the Lord as the Supersoul within the sacrificial fire.