Camping Alone

I've been going on a lot of solo trips the past year. I love backpacking with a friend or two, but the older I get the harder it seems to coordinate schedules. So I just head out on my own. I'm wondering what is everyone's favorite activity to keep themselves occupied at night when you're alone before you fall asleep (PG please!). There's always a few hours in the evening before I pass out, where I feel a little bored/lonely and paranoid (every twig breaking is a bear or a serial killer). Do you like to read a book, play cards, etc? I myself usually end up sipping some tea and reading a book. I'm curious as to what pastimes others enjoy when they are camping alone at night.