I am practicing permaculture on some level. In my view the work of Masanobu Fukuoka is as important as that of Bill Mollison. AND I would also toss in this guy's ideas too:
http://earlyretirementextreme.... -- even though his focus isn't on gardening at all, but on Optimizing your stuff and your activities.
But I have a long way to go to really understand Food Forests and Hugelkultur techniques.
I think I am only just getting my toe wet with applying its ideas to my little plot of land.
I'd put myself as a 3 on a scale from 1-10 -- with a big growth spurt happening right now!