Number 9 as I like to have my body balanced when I sleep. Hands on the chest and legs straight out like in the picture 9.
Looks a lot like how the pharaohs used to sleep because they knew the most reliable and relaxing position would make you enter the dreaming world fast and carefree.
I also dont have my phone in the same room because it interferes with sleep and gives the human brain random electric signals.
I turn it off and cover it with a blanket and put it in my garage.