A- The Prophet's Sunnah regarding the fasting of Ramadan:

1- It was part of the Prophet's Sunnah during the month of Ramadan to increase the acts of worship as Gabriel did when he taught him the Qur'an during Ramadan.

2- He used to pay charity frequently, recite the Qur'an, perform Salah, say Dhikr (Frequent mentioning of Allah), and observe I'tikaf (retiring to the mosque for worship).

3- He used to single out Ramadan with special acts of worship to the extent that he used to continue fasting, but prohibited his Companions to continue fasting and only permitted Muslims to continue fasting until the pre-dawn meal.

4.
It is Sunnah to pray Tarawih in congregation and the one who knew the best the practice of the Prophet at night, 'A'ishah said, "Allah's Messenger did not increase upon eleven raka'at in Ramadhan, or outside it." [Al-Bukhari and Muslim]All who are capable should take advantage of the month of Ramadhan and perform i'tikaf, i.e. fully attach oneself to worshipping in the mosque. One should inquire how the Prophet performed i'tikaf.Zakat ul-Fitr is prescribed by Allah as a purification for those who fasted from loose and indecent talk, and to feed the poor
B- The Prophet's Sunnah regarding what is lawful and prohibited during fasting:

1- A person who observes fasting is prohibited to commit obscenities, clamorousness, insult others, or respond to abusers. However, he commanded the observer of fasting to respond to abusers by saying: I am fasting.

2- Sometimes the dawn broke while he was in the state of major ritual impurity, then he would take a bath after dawn and resume fasting, (this complies to Period times for Woman too)

3- He used to kiss some of his wives while fasting during Ramadan.

4- He used to use a Miswak, rinse (his month), inhale water, and pour water on his head while fasting.

5- It was part of his Sunnah to drop making up for the day in which a person eats or drinks by mistake.

6- He granted a concession for the sick and travelers to break their fast then make up for that day, likewise pregnant and breastfeeding women if they fear for themselves.