Comfort is a big deal when you're trying to get some sleep. The number of pillows you use, the kind of pillows, the arrangement - I am very particular about my pillows. To the point where I sometimes bring my own to a hotel.
I sleep with three pillows. They're really old pillows that have been flattened down but I'm so used to them that I can't bring myself to buy new ones. I sleep with two under my head, one going vertically, one going horizontally. I don't know why. I've done that since I was pregnant. Then I always have to hold a pillow. I've done that since I was in high school. I have to cuddle it while I'm sleeping.