Sharpening a chainsaw is an essential maintenance task that helps keep your saw in top working condition. To sharpen your chainsaw, you will need a round file, a flat file, and a filing guide. Begin by securing the saw in a vice or clamp to prevent movement while sharpening. Then, using the filing guide as a reference, use the round file to sharpen each tooth by filing toward the saw's motor. Next, use the flat file to smooth out any burrs on the top of the teeth. Re-adjust and repeat for each tooth until all are sharp and uniform.