—namely, to say: “Lā ilāha illā Allāh waḥdahu lā sharīka lah…” once—except after Maghrib and Fajr, when it is said ten times—then to say “Subḥān Allāh” (Glory be to Allah), “al-ḥamdu lillāh” (praise be to Allah), and “Allāhu akbar” (Allah is greater) thirty-three times each, which makes ninety-nine in total; the hundredth is completed with “Lā ilāha illā Allāh waḥdahu lā sharīka lah….”
After that one recites Āyat al-Kursī, Sūrat al-Ikhlāṣ, and the two chapters of refuge, and then—specifically after Maghrib and Fajr—adds: “Allāhumma ajirnī mina n-nār” (O Allah, save me from the Fire) seven times.
Splendid and widely known texts speak of the virtue of this remembrance, but space does not permit citing them here. Once the remembrances are finished, one should supplicate with sincerity, for supplication itself is worship and sincerity is its cornerstone.
Shaykh Taqī al-Dīn said: If the one who supplicates is not sincere and does not avoid the unlawful, his request is unlikely to be answered—unless he is compelled or wronged.
In summary, after completing these post-prayer litanies it is recommended to invoke blessings upon the Prophet ﷺ and then ask for whatever one wishes, for supplication at this moment—particularly after remembering Allah, praising Him, and invoking blessings on His Prophet Muḥammad ﷺ—is among the times most deserving of acceptance.