I probably blow up my 2L platapus bladder and/or use my shoes more than any other item(s) for my back country pillow. When not being used for a shelter, I will use my shelter/rain-gear as a pillow. I used to use extra clothing in a stuff sack as my pillow, but these days, when I crawl into bed, the only things I have that I'm not wearing or using as shelter are my pack, my cooking gear, my food, my first aid/emergency kit, and my shoes. On an unexpectedly warm night, I might have some warm cloths, but they usually get put on before morning if I planned well. I find my food bag to be too lumpy and I don't like to squish it with my fat head. My stove and pots aren't very comfortable, and my backpack is often under my legs/feet.