I sometimes went to bed early just to think! I was excited about it and looking forward to it. I don't do that anymore, but going for a walk without smartphone, no music, no audiobook reminds me of that time.
> When I was a kid, I would often sit on my bed and stare at the wall. My Dad would walk by my room and ask if everything was ok. I would always say "yeah", since I was literally just thinking.