Oh speaking of breathing, there is a yoga trick called the 4-7-8 breath. Dr. Andrew Weil the famous integrative physician teaches this to people to help them relax, and a recent article said that some people say it puts them to sleep within minutes. Here's how it works.

You place your tongue behind your upper teeth in a relaxed way. Start tapping your finger at a comfortable pace, maybe a little faster than a heartbeat (but you can experiment with this). Breath in through your nose for a count of four taps. Hold your breath for a count of seven taps. Then breathe out through your mouth (keeping your tongue there) with a whoosing sound for eight taps. You can also skip tapping if you feel you can hold a steady count in your mind. Repeat like this: 4 in, hold for 7, 8 out.