Hold the shaver in your hand, as you would if you were shaving your face. Use a new, sharp shaver. A dull shaver may snag your fabric.
Position the blade edge on the upholstery, where there is evidence of pilling.
Move the shaver towards you, over the fabric, as you might move the shaver over your face.
Run your hand over the area you just shaved to pick up loose pilling debris. Repeat shaving the fabric until you remove all of the lumps.