12. Make your heart stand still!
Trying to quell first-date jitters? Blow on your thumb. The vagus nerve, which governs heart rate, can be controlled through breathing, says Ben Abo, an emergency medical- services specialist at the University of Pittsburgh. It'll get your heart rate back to normal.
I think that one would come in handy when I'm on stage or up in front of my church...!
Here's the link.