Nice to have someone of your ability on Brown - shows us what's possible.
If you have the time, could you explain what you mean by "discipline"? Just trying to profit from what you've learned, never having had any coaching myself;-)
When I say discipline I mean being very deliberate in my orienteering, always doing something planned rather than just running in the general direction of the control or even just my next 'collecting feature'. In this terrain it was easy to look at a leg, quickly describe a straight route, and then just go without paying enough attention to following a handrail or passing specific features, or paying much attention to my compass. It takes a little more mental energy to do those things (thus discipline) but it is always results in better (and more enjoyable) orienteering for me.
Something like Klas Karlsson's systematic orienteering:
"...planning and completing each leg the way you would if you were sitting at home at the kitchen table looking at the map. Orienteering is really easy when you are sitting at the kitchen table! The difference between the kitchen and the forest is that in the forest you are tired and your thinking is as sharp as a butter knife. To solve problems in this condition it is important to have a tactic, strategy, or whatever you want to call it, to be able to easily concentrate on what is important. This is what I call “systematic orienteering.”