Japa meditation - Hare Krishna. Srila Prabhupada.

"The performance of yajña is a very difficult task because all the demigods must be invited to participate in the yajña. In this Kali-yuga it is not possible to perform such costly sacrifices, nor is it possible to invite the demigods to participate. Therefore in this age it is recommended, yajñaiḥ saṅkīrtana-prāyair yajanti hi sumedhasaḥ (SB 11.5.32). Those who are intelligent should know that in the Kali-yuga there is no possibility of performing the Vedic sacrifices. But unless one pleases the demigods, there will be no regulated seasonal activities or rainfall. Everything is controlled by the demigods. Under the circumstances, in this age, in order to keep the balance of social peace and prosperity, all intelligent men should execute the performance of saṅkīrtana-yajña by chanting the holy names Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. One should invite people, chant Hare Kṛṣṇa, and then distribute prasāda. This yajña will satisfy all the demigods, and thus there will be peace and prosperity in the world. Another difficulty in performing the Vedic rituals is that if one fails to satisfy even one demigod out of the many hundreds of thousands of demigods, just as Dakṣa failed to satisfy Lord Śiva, there will be disaster. But in this age the performance of sacrifice has been simplified. One can chant Hare Kṛṣṇa, and by pleasing Kṛṣṇa one can satisfy all the demigods automatically."

(Śrīmad-Bhāgavatam 4.6.53, Purport).

https://prabhupadaconnect.com/Sankirtana-Yajna.html