These following Sunan can be fulfilled everytime we sleep, during the day and night.
1 - Dust the bed: "... When one of you goes to bed, let him dust the bed because he does not know what comes into it before or after him." [Bukhari: 6320; Muslim: 2714]
2- Sleeping on Wudoo` and lie on right side.
The Prophet, sallAllahu 'alayhi wa salam told al-Baraa` bin 'Aazib, radiallahu 'anh, If you go to your bed, then do your wudoo` (ablution) as you would do it for prayer, then lie on your right side" [Agreed upon (Bukhari: 6311.Muslim: 2710)]
3 - Place the right hand under the right cheek.
"When the Prophet (sallAllahu alaih wasallam) retired to bed at night, he (sallalahu alaih wasallam) would put his hand under his (right) cheek and then say, "Allahumma bismika amutu wa ahya (O Allah, by Your Name I die and I live)" and when He (sallalahu alaih wasallam) got up (from sleep), he (saws) would say, "Al-Hamdu lil-lahi al-ladhi ahyana ba`da ma amatana, wa ilaihi an-nushur (Praise be to Allah Who gave us life after death, and to Him is the return." [Bukhari: 6314; Muslim: 5045]
4 - Recite Soorat Al-Kaafirun (109:1-6)
From its benefit: It frees the person from Shirk. [Aboo Dawood: 5055; At-Tirmidhee: 3403; Ahmad: 23807; Al-Hakeem: 2121]
5 - Reading Soorat al-Ikhlaas, al-Falaq and an-Naas before sleeping.
From 'Aishah radiallahu 'anha, the Messenger, sallAllahu 'alayhi wa salam used to recite "Qul huwallahu ahad", "Qul a'oothu birrabilfalaq" and "Qul a'oothu birrabinnaas" every night when he went to sleep, then wiped his face and whatever he was able from his body, beginning with his head and face, and what faces him from his body, three times". [al-Bukhaari: 5017]