Daily after Maghrib Salah, 2 nafal for protection of faith should be offered. After Surah Fatiha, Surah Qadar once, Surah Ikhlaas 6 times and Surah Falak once and Surah Naas once should be recited in both the rakat. You perform this act all your life and Allah (S.W.T) will protect your faith and Allah willing your life will end with faith and one who dies a Faithfull’s death, he will definitely enter the heaven with recommendation of holy Prophet Muhammad(PBUH)  insha Allah.

Note: If due to busy life cannot find time for these 2 nafal to be offered separately then just offer the last 2 nafal of Maghrib prayers with the Niyyat (intension in heart) for protection of faith (Bint-e-Iftikhar, Sargodha)