... a pencil sharpener in their emergency kit? I keep a small no-weight plastic pencil sharpener in mine. (I even keep a pencil in there but that's not what the sharpener is for.) It's for making REALLY thin wood shavings for tinder quickly. That's its number one usage. However it's also for making REALLY sharp points for emergency arrows, fish spears, dead fall traps, etc. Sure, I could cut all these with my pocket knife, but it's not nearly as much fun as using a pencil sharpener! 
Stitchawl
Stitchawl