Such an important part of sleep hygiene that I think is commonly missed. Thank you for bringing this topic up for discussion! Another important part of the story is what you first say to yourself when you first wake up. I find myself feeling more rested on the days that I wake up telling myself that I slept well than I do on the days I wake up and complain about sleep.
Ah! that's exactly what I said! They did a study into it and found that this worked. Complaining makes you more tired!
I was pretty certain I had read it in a study as well, but couldn't remember so I didn't say such. I wonder if we can find that study..