EARPLUGS!!! Totally changed my ability to sleep when camping.
I'm a light sleeper. Regular noises I can get used to, like trains, aquarium filters, fans, dogs barking, etc. But as soon as a new noise is introduced or familiar one is taken away, I wake up wide awake and it takes a while to fall back asleep. I once woke up when the power went out and the aquarium filter stopped running.
So, when camping, even though the noises don't bother/scare me, they still wake me up because I'm not used to leaves/needles falling on my tent, mice/birds scurrying around, wind in the trees or against my tent, etc. If I slept outdoors everyday, they wouldn't be a problem, but I don't...
Regarding pillow's: If you use a water bladder, blow air back into it to inflate it to the desired firmness, then cover it with your buff, or some unworn piece of clothing. Super comfy. No water bladder? clothes in a stuff sack are the next best thing to me.