First: It is recommended to postpone breaking one’s fast later than the Isha’ Prayer unless one is too weak to keep fasting or one is being waited by people to break the fasting altogether, in an invitation for example.
Second: It is recommended to begin breaking the fast with utterly legally gotten food, especially dates. This act doubles the reward of the prayer to four hundred folds. It is also advisable to break the fast with dates, ripe dates, candy, sugar-candy, and cool water.
Third: It is recommended to recite Surah al-Qadr at breaking the fast
It is recommended to say the familiar supplicatory prayers of breaking the fast, such as the following:
اللّٰهُمَّ لَكَ صُمْتُ وَ عَلَى رِزْقِكَ اَفْطَرْتُ وَ عَلَيْكَ تَوَكَّلْتُ
O my Allah, for Thee, I fast, and with the food Thou gives me I break the fast, and I rely on Thee.
This supplicatory prayer also brings about a great merit. It has been narrated that Imam Ali(a.s.) used to say the following supplicatory prayer when he would break his fasting:
بِسْمِ اﷲ اَللَّھُمَّ لَکَ صُمْنَا وَعَلٰی رِزْقِکَ اَفْطَرْنَا فَتَقَبَّلْ مِنَّااِنَّکَ اَنْتَ السّمِیْعُ الْعَلِیْمُ
In the name of Allah, O Allah, we fast, and with the food Thou gives us we break the fast, an obligation we fulfill, and Thou art Hearer, Knower
It is recommended to say the following imploration for forgiveness at the first bite of the food with which the fasting is broken: Forgiveness of Almighty Allah is the reward of those who say this imploration.
بِسْمِ اللّٰهِ الرَّحْمَنِ الرَّحِيمِ يَا وَاسِعَ الْمَغْفِرَةِ اغْفِرْ لِي
In the name of Allah, the Beneficient, the Merciful, O He whose indulgence is boundless, forgive me
A Hadith reads: Almighty Allah releases from Hellfire one million persons at the last hour of every day in Ramadan; therefore, pray Him to include you with these released ones.