[Warbaryan]

In what way do you feel the breath should be controlled? I've tried this on and off, but I don't feel that I have never got it quite right.

Attention is the key. Learn to be attentive, become aware of what is happening when you breathe. I don't think it's usually a good idea to deliberately force the breath. Use attention. And if you find some thread to follow and it feels useful, let the power guide.