You wake up in the middle of the night and can't get back to sleep.
Whether you drank one cup of coffee too many earlier, or you've got a lot on your mind, it's time to decide whether to get up or stay in bed.
Getting out of bed makes sense at some point. Tossing and turning endlessly isn't going to help.
If you do get up, though, you're not giving up for the night. You still need rest. So your goal should be to get back to sleep as soon as possible.
Some activities help with that. Others put...