How do you adjust your truss rod to properly set up your guitar?

To adjust the truss rod on a guitar, use an appropriate tool to turn the nut located at the headstock. Turning it clockwise tightens the rod, straightening the neck, while turning it counterclockwise loosens the rod, allowing the neck to bow slightly. Make small adjustments and check the neck's curvature by sighting down the fretboard to ensure it is straight or slightly bowed. It's important to make gradual adjustments and seek professional help if unsure.