Also exercise.

Sleep restores you. Exercise is the spark.

Good exercise also contributes to good sleep. I sleep like a log after a good bike ride or an evening out swing dancing, but if all I did was sit at my desk all day then it’s a lot more likely I’ll be tossing and turning or doom scrolling into the wee hours.

Hiking is my go-to when I need to figure something out. I think walking also helps chew on complex problems, more so than more intense exercise like strength training and running (though that's also beneficial).