Try a disposable razor! Keep one on your laundry shelf and pull it down whenever you need to clean off a t-shirt or sweater. Depending how you store it and how often you use it, the same razor can last for years. Spread the fabric across a flat surface (something firm like a table is best), pull the fabric taut, and carefully shave the pilling away from the fabric. Be careful with the razor, especially around seams, buttons and stitching because you can easily cut the fabric.