Narrated Abu Huraira:Allah’s Apostle said, ”Whoever says one hundred times in a day:
“Laa ilaaha illallaah wahdahuu laa shareeka lahu, lahu-l-mulk wa lahu-l-hamd wa huwa ‘alaa kulli shai’in qadeer,”Sunnah about sleeping:
Recite before sleeping 33 times Subhan`Allah, 33 Alhamdulillah and 34 Allahu`Akbar.
To recite Surah Iqlaas, Surah Falaq and Surah Naas three times before sleeping thereafter blowing over the entire body thrice.Before going to bed make it habit to pray Witr. You may choose the numer of raka'ah but the minium number is one.