Everything has a precise spot, and it changes practically every trip. That's something I love doing, trying completely new configurations and organizations and by the third or fourth day of a trip, I will have stuff settled into wherever works best. Usually everything is inside a combination of ziplocks and/or small stuffsacks.

I always find, however, that having the hammock, water, and purifier as handy as possible is the best setup. Nothing like a half hour nap swinging lazily by a stream while you wait for water...