1. It is sunnah for one to sleep in the state of Wudhu.
عن معاذ بن جبل رضي الله عنه قال قال رسول الله صلى الله عليه و سلم ما من عبد بات على طهور ثم تعار من الليل فسأل الله شيئا من أمر الدنيا أو من أمر الآخرة إلا أعطاه (ابن ماجة رقم 3881)
Hadhrat Muaadh bin Jabal (Radhiallahu Anhu) reports that Rasulullah (Sallallahu Alaihi Wasallam) said: “The one who sleeps in the state of wudhu, and thereafter wakes up during the night (or turns from one side to the other), and asks Allah Ta’ala for anything of this world or the Hereafter, Allah Ta’ala will surely grant it to him.
2. One should dust the bed before sleeping.
عن أبي هريرة رضي الله عنه قال قال رسول الله صلى الله عليه وسلم: إذا أوى أحدكم إلى فراشه فلينفض فراشه بداخلة إزاره ، فإنه لا يدري ما خلفه عليه (البخاري رقم 6320)
Hadhrat Abu Hurayrah (Radhiallahu Anhu) reports that Rasulullah (Sallallahu Alaihi Wasallam) said: “When any one of you retires to bed, then he should dust the bed with the inner-part of the tail of his lungi. The reason being is that one is unaware of what could have entered his bed in his absence.