Re: Breathing Exercise and Meditation
I'm in a Ki Society dojo; we do breathing exercises a couple of times a month, weapons a couple of times a month (sensei's whim on both of them; sometimes it's more often, sometimes less).
I learned one at Maui Ki Society which looks and sounds way too much like a cat coughing up a hairball; I'm sure it's useful, but I had trouble keeping a straight face!
We also do bell-ringing misogi, which is a form of active meditation. My home dojo only does it a few times a year, mostly around the New Year; pity, because it gets a lot easier with practice.