Operative according to the hygienic conditions of good sleep: adequate sleep, good sleep, for example, it is not too hot. Not too cold, or cold. No, there should be a loud atmosphere, quiet, or is instrumental light etc.
Practice good sleep hygiene, such as the bedroom, perfect for sleeping, such as not too hot. Not cold or too cold Not so noisy, boisterous There should be a calm atmosphere Or music played softly, and so on.
Behave in accordance with good sleep hygiene, including bedroom right to sleep, such as not too hot, not too cold or too cold, not to loud noise. There should be a peaceful atmosphere. Or may have a light music.