2005 pt cruise code301 cylinder 1 misfire

my check engine light is on and my car stumbles like it wants to die..i took it to auto zone and they said its a code301 cylinder 1 misfire...does anyone know what that is and what how to fix it....help
Cylinder misfires can be caused by a faulty spark plug,spark plug wire,fuel injector,ignition coil..etc
Or worst case scenerio,internal engine problem.

You should take it in to have it diagnosed so you just don't throw parts at it.
Probably won't hurt to have it "tuned up"..New plugs ,wires ,filters..etc.