How did you build and maintain your running to over 100 MPW?

I'd like to hear how you safely built to 100 MPW and stayed at that level. I've run 50-60 miles a week for years (not at this present time though becuase of long term sickness). I've got up to 70 a few times. But my legs feel dead and I can't do any hard workouts when I get in the 60-65 range.

Aren't you always tired, sore, worn out and hungry running that much? I can't image doubling my milage while working, being married, raising children, etc.

Please do not mention the 10% rule. Perhaps it's true, but I've heard that rule before.