What to do when you can't sleep

Having trouble sleeping? Hit Snooze is Mashable's deep dive into how we cope with our collective insomnia and the many ways we can achieve a more peaceful slumber.You're exhausted. All you need is sweet, precious, lovely sleep. But the very thing you need right now just won't happen. You toss, you turn, you tear your hair out, but you don't drift off.
So, what do you do when you can't fall asleep? It's a question I've asked myself many a time when slumber has escaped me. Sleeping doesn't always