Abdullah bin Masood (R.A.) states that Prophet Mohammad (S.A.W.) has said that the person who recites Suratul Waqia (para 27) every night, will never be poverty stricken (hungry) (Baihagi in Shabatul Iman)
إِنَّ فِي خَلْقِ السَّمَاوَاتِ وَالْأَرْضِ
in Surah Al-Imran till the end of the Surah on any night or part of the night, will receive the reward of performing his Salaat for the whole night.
Jabir (R.A.) states that Prophet Mohammad (S.A.W.) never slept before reciting Surah Alif Laam Meem Sajda (21 para) and Surah Tabarakal Lazi.
Abdullah bin Masood (R.A.) narrates that Prophet Mohammad (S.A.W.) has stated that the person who recites the last two ayats of Suratul Baqarah till the end, then these two ayats will be sufficient for him, i.e. Allah will protect him from all evil and ploys.
When retiring to sleep, make wudhu, dust off the bed three times, lie on the right side, place the right hand under the head or cheeks and recite the following dua three times.
(Mishkat and Hsinul Hasin, Bukhari Muslim)
اللَّهُمَّ قِنِي عَذَابَكَ يَوْمَ تَجْمَعُ عِبَادَكَ
"O Allah, save me from the punishment on the Day when You will gather Your servants".
بِاسْمِكَ رَبِّي وَضَعْتُ جَنْبِي وَبِكَ أَرْفَعُهُ إِنْ أَمْسَكْتَ نَفْسِي فَارْحَمْهَا وَإِنْ أَرْسَلْتَهَا فَاحْفَظْهَا بِمَا تَحْفَظُ بِهِ عِبَادَكَ الصَّالِحِينَ
"Oh Allah, I have taken Your name and placed myself on my side and by Your power will rise up again. If you take my soul whilst I am sleeping (grant me death) then have mercy on my soul and if you leave me (let me live) by your power protect me by that with which you have protected your righteous servants".
اللَّهُمَّ بِاسْمِكَ أَمُوتُ وَأَحْيَا
"O Allah, by Your name I live and die".