After item 26 (meditation) (of the positive actions), the twenty-seventh is to serve tulasi, the twenty-eighth is to serve the Vaisnavas, the twenty-ninth is to live in Mathura, the birthplace of Lord Krsna, & the thirtieth is to read SB regularly

Expressions researched:
"After item twenty-six (meditation), the twenty-seventh is to serve tulasī, the twenty-eighth is to serve the Vaiṣṇavas, the twenty-ninth is to live in Mathurā, the birthplace of Lord Kṛṣṇa, and the thirtieth is to read Śrīmad-Bhāgavatam regularly"

Sri Caitanya-caritamrta

CC Madhya-lila

After item twenty-six (meditation), the twenty-seventh is to serve tulasī, the twenty-eighth is to serve the Vaiṣṇavas, the twenty-ninth is to live in Mathurā, the birthplace of Lord Kṛṣṇa, and the thirtieth is to read Śrīmad-Bhāgavatam regularly.

CC Madhya 22.125, Translation and Purport

“Tadīya means the tulasī leaves, the devotees of Kṛṣṇa, the birthplace of Kṛṣṇa (Mathurā), and the Vedic literature Śrīmad-Bhāgavatam. Kṛṣṇa is very eager to see His devotee serve tulasī, Vaiṣṇavas, Mathurā and Bhāgavatam.

After item twenty-six (meditation), the twenty-seventh is to serve tulasī, the twenty-eighth is to serve the Vaiṣṇavas, the twenty-ninth is to live in Mathurā, the birthplace of Lord Kṛṣṇa, and the thirtieth is to read Śrīmad-Bhāgavatam regularly