Tool: Off-set Handled Scissors
These scissors are a great new tool for cutting through cardboard. The off-set handle makes it easier to maneuver around corners and curves, and the wide openings in the handles provide for a roomy grip. The English translations for the packaging here in Japan always makes me chuckle. These scissors are definitely either made of hard materials, or will help you go after a hard(difficult) task!
On a scissors space-time continuum, the off-set handled scissors definitely rate as the best for getting through cardboard, even outperforming the "chicken boning shears." At the other end of the spectrum we have my sewing scissors, which I would never, ever use to cut cardboard, our household paper scissors, the delicate, but still useful for poking small holes embroidery scissors, and last but not least, wooden scissors. They actually do cut paper.