I was just thinking about deep breathing and found this thread on the topic. I absolutely agree that deep breathing can be quite helpful for every day health, and even more helpful in stressful situations.
I am striving to do my best to sit up and do long, deep breaths more often, especially if I feel my shoulders tighten up. It's wonderfully relaxing!
A yoga technique us to block one nostril with a finger, and breathe in slowly. Hold, then breath out. Now unblock that one and block the other nostril. Do the same thing. After a few rounds I feel much more relaxed.
It would seem that breathing should be so easy - but it's so easy to fall into shallow stress breathing.