The Prophet (s) used to recite al-Musabbihat suras every night before sleeping. In a hadith from Imam al-Baqir (a), it is mentioned, "One who recites al-Musabbihat before sleeping would meet Imam al-Mahdi (a) before dying and if he dies, he will be with the Prophet (s).
Before going to bed, make sure you perform wudhu and then recite these six surahs:
al-Hadid (57), - 8:50 mins
al-Hashr (59), - 6:40 mins
al-Saff (61), - 3:30 mins
al-Jumu'a (62), - 1:30 mins
al-Taghabun (64), - 3:40 mins
al-A'la (87). - 0:45 mins
Then sleep on your right side.