In addition to sleep

condition for a perfect sleep:

First of all have a quite room, short ventilated before and nippy. At best without any heating. Better to find the warmth under your blanket. The perfect pillow is an individual decision. Important is that your neck and head got the right position otherwise you got tensions and you feel sleep-deprived.
Although you need a complete dark room without any light howsoever small. Because it´s  important for your melatonin production. Melatonin is a hormone which regulated your sleep.

At the end in that post my lovely dreamer you should have a glass of water (within reach). Human being loses a half liter liquid per sleep.

Then have beautiful dreams...maybe of a heavenly place like that...