Hey Fish,
We were shown a neat little circular breathing exercise in school as part of a brief didj lesson, which might be useful for you. (Yes, an Australian school.
)
Grab a cup full of water and a straw. Practice blowing out through the straw in your mouth whilst breathing in through your nose.
I've seen players who look as though they're taking a snatch of a breath in through their nose, but I think it's that when you're almost out of air, you let your nasal passages fill with air while expelling through your mouth. Quite tricky.
Chelsea
"Every instrument has to abide by the Clave. Stay on the Clave and you'll make it." - Tito Puente