Travel pillows are a must. I always kick myself when I forget to bring one on a trip.
The average travel pillow leaves much to be desired. Because of the fillers---usually styrofoam, microbeads, or buckwheat hulls---the pillows make strange crunchy noises everytime you move your head.
The good folks at Eagle Creek must have had these complaints in mind when they designed the inflatable Comfort Travel Pillow ($15). The pillow's self-sealing Air Flow valve allows you to inflate the pillow in three deep breaths, and because there's no filler material, strange crunchy noises have been eliminated.