The biggest problem I have at times is waking up in the middle of night (like around 3 AM) and having trouble getting back to sleep for about an hour or two. It's very hard on the days when I have to go to work. I would fall into a good sleep around 4:30 and then it's only an hour before I have to get up.

I've heard that humans get into their deepest sleep at 2 8 AM. I believe that. That's what makes it hard for me to get up when that happens. Sorry, I don't have any advice or suggestions.