You know, this had been working so well, but then I seem to have lost the knack in recent months and I don't know what went wrong. Somehow I need to figure out how to rebuild this fury from scratch.

An observation I have made from my own experience is that fury is powerful fuel that is best used as a trigger for self awareness. It is best used to develop an observing ego and give myself direction that can then be used with a calm sense of purpose. Fury is not for long term consumption and our minds will tend towards homoeostasis even if that means sabotaging all our good intentions to get to that balance.