Here is an article that I received in the most recent Rejuvantion Lounge Newsletter about Alternate Nostril Breathing.  If you've been in one of my hypno-meditation classes, I've no doubt had you do this specific breathwork.  So if you've forgotten all the amazing benefits for less than 5 minutes of breathwork check this out. 

She also mentions a book I'm going to hunt down, Tao of Natural Breathing.

Of all the e-newsletters that I subscribe to, this is the one that I consistently read.  Excellent content, minimal advertising.