"Verily! In the creation of the heavens and the earth, and in the alternation of night and day, there are indeed signs for men of understanding. Those who remember Allah (always, and in prayers) standing, sitting, and lying down on their sides, and think deeply about the creation of the heavens and the earth.'' (Ali Imran - The Family of Imran : 190,191)
I always stay with my sons before they go to bed in the night...just for reading a book, talking about their day or laughing....and of course a little reminder about good deeds...
One night I told them about what a moslem should be done before they went to sleep...
1. Performing ablution.
The Prophet (peace be upon him) told Al-Baraa` bin Aazib (RA) "If you go to your bed, then do your ablution as you would do it for prayer, then lie on your right". (Sahih Bukhari & Sahih Muslim)
2. Sweep your bed.
"When any of you goes to bed, he should shake off (or dust off) his bedsheet because he does not know what might have fallen on it after he had left it." (Al-Bukhari and Muslim)
This Hadith calls our attention to a very important matter that before going to bed, we must shake off our bed-sheet, mattresses, etc. It is quite possible that some poisonous insect might have passed over it when we are not there and the effects left by it may prove harmful to us.
3. Supplication before sleep.
Hudhaifah and Abu Dharr (May Allah be pleased with him) reported: The Messenger of Allah (peace be upon him) used to supplicate when he went to bed at night: "Bismik-Allahumma ahya wa amut (With Your Name, O Allah, I expire and return to life)." (hadith Al-Bukhari)
4. Recite Al Quran.
Recite Ayat Al Kursi, Al Ikhlas (The Purity of Faith) three times, Al Falaq (The Dawn) and An Nas (Mankind).
Abu Amamah (ra) narrates that the Prophet (peace be upon him) said that whomsoever recites ayat Al-Kursi in the night before sleeping, Allah Most High will protect him, his house and the neighbouring houses.
The Prophet once told Lady Fatima (peace be upon her) to recite the entire Qur'an, perform one Hajj and one Umrah, make all the believers pleased with her, and receive the intercession of all the Prophets before going to bed every single night.
When she asked how such a feat could be accomplished, he taught her that reciting Surah Al Ikhlas (The Purity of Faith) three times would be equivalent to the reward of reciting the whole Qur'an, reciting Tasbehaat Arba three times would equal the reward of one Hajj and one Umrah, asking for the forgiveness of the believers will make all of them pleased with her, and sending peace and blessings upon the Prophets would guarantee her their intercession on the Day of Judgment.
There are still some manners to do before sleep...but at this time I just told them to do those four points first...
May Allah bless and protect you from bad deeds my son...