I carry a small fingernail scissors. They're what I use to trim my toenails & fingernails, which can be handy on a long hike. They're also good for cutting tape or moleskin, or trimming away dead skin. If necessary I could use them to trim my nose hair, too!

Most importantly, they cut things. Ineffective, dull scissors that chew on things are maddening. Same with scissors so tiny they are barely useable.