I was just starting to pack up my pack for my upcoming Long Trail hike, and was wondering how everyone else did it. I have found that, with my pack and gear, it works best to have my sleeping bag in the main pocket and my tarp, bivy and rain gear in the sleeping bag section. My "essentials" stuff sack (first aid kit, head lamp, knife, gloves) is in an outside pocket. Both large pockets are lined with garbage bags.
I know this is very dependant on what your personal pack and gear are like, but I'm sure that, especially on a long hike, everyone develops their own way of packing... so how do YOU pack your pack?