The Sunnah to recite in the first Rak`ah a Surah that is longer than what one recites in the second Rak`ah.

With regard to the Adhkar which are spoken on the tongue, such as reciting Quran, saying Tasbih, Tahmid, and Tahlil, and the Dhikrs to be recited in the morning and evening, when going to sleep, when entering the washroom, and so on, it is essential to move the tongue, and a person is not regarded as having said them if he does not move his tongue.

There is nothing wrong with reciting two or three Surahs after Al-Fatihah whether you are an Imam or a member of the congregation, except that the Imam should do that only occasionally.

If the Imam’s mistakes do not alter the meaning of Al-Fatihah, there is nothing wrong with praying behind him. But if his mistake changes the meaning, then people should not pray behind him if he does not benefit from prompting.

Reciting the Basmalah before reciting Al-Fatihah is one of the Sunnahs of prayer. If someone omits it deliberately or because he forgot, he does not have to do the prostration of forgetfulness.

It is recommended to recite Surat al-Kafirun and Surat al-Ikhlas in the two Sunnah rak‘ahs of Fajr and Maghrib.