I can't remember the movie, I was just a kid when i saw it... Some old classic I'm sure, something with Steve McQueen in it. It was a prison camp movie. The question was posed about how to keep your sanity when locked away in isolation.
He said he used to spend a lot of timing working on his motorcycle, so in his mind he'd take it apart and put it back together... bolt by bolt. I'm an only child, I was a single parent. My sanity is still intact (that's what my voices tell me ;) ) because I'll never forget that movie line. I don't take apart motorcycles, but the concept is the same. It works in the woods just as well.
I guess if a person can't find something to do in their own head, then more "stuff" is the answer. Lots of threads on using a smartphone as a do-it-all device for podcasts, kindle, games, movies, etc... Could carry a ton of batteries for the weight of a kindle I'd think.
I'd rather stay up late, than get up early, when it's dark, cold and wet and I'm hungry and thirsty and have to pee... I'm not a good morning person.