At forbidden prayer times, you can offer these nafl prayers: 1- The two rak’ahs following tawaf, 2- Repeating a prayer in congregation, 3-The Sunnah following Dhuhr prayer if one is putting Dhuhr together with `Asr, 4- One who comes in on Friday when the imam is delivering the khutbah; he may pray two brief rak`ahs, 5- The funeral prayer may be offered during the lengthy times when prayer is not allowed.

In tarawih prayer, you can say the opening takbir standing and then sit, or you may say the opening takbir whilst sitting, then when you feel more energetic you can get up, and this is better and preferable.

Salat al-Raghaib is a bid`ah that has been introduced in Rajab. It is done on the night of the first Friday in Rajab, between Maghrib and `Isha, and is preceded by fasting on the first Thursday of Rajab.

There is no Sunnah prayer after Fajr prayer. Before Fajr there is a Sunnah ratibah prayer (established Sunnah) which is two rak`ahs.

1. Qiyam al-layl means spending the night, or part of it, even if it is only one hour, in prayer, reading Quran, remembering Allah (dhikr) and other acts of worship. 2. Tahajjud means specifically praying at night, and some scholars limited it to prayers that are offered at night after sleeping. 3. Taraweeh refers to qiyam al-layl in Ramadan at the beginning of the night, which should be made light and not lengthy. It may also be called tahajjud or qiyam al-layl.

The Hadiths indicate that it is permissible for the one who is observing a voluntary fast to break it especially if he is invited to eat by a Muslim.