Go to your local university extension office.
Find a permaculturalist in your area. Find out who has done a
PDC and get recommendations from them. Perhaps and ex-student?
Read
Gaia's Garden / Food Forest /
Perennial Edibles / Anything by Mollison
Observe
Make a list of priorities and start researching/asking each one.
Things to consider:
-Pathways/Roads.
-water flow
-what you need/want from the system: (7 f's: food, fuel, fiber, fodder, fertilizer, and "farmaceuticals," as well as fun)
-what the system wants from you: repair/habitat.
william