Pick arugula leaves from a home garden, or get them at your favorite produce section at any grocery store or vegetable market.
Grasp the leaves proper, and hold them firmly down on a cutting board.
Cut off the stems and roots with a paring knife or a pair of culinary scissors. Trim these parts to remove all fibrous, woody or chewy texture from the leaves themselves, but allow the leaf to remain intact.
Dispose of the stems and other trimmed parts in either a compost pile or the trash container.