Recite Surah al-Falaq (113) after every obligatory prayer. — After Prayer Adhkar
قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ مِنْ شَرِّ مَا خَلَقَ
Transliteration: Qul a'oodhu birabbil-falaq...
Translation: Recite Surah al-Falaq (113) after every obligatory prayer.
Reference: Abu Dawud, An-Nasa'i