Spray your couch with an anti-static laundry spray. Hold the spray at least 2 feet from the couch when you spray the area so that you don't stain your couch. Spraying from a close distance concentrates the liquid over a small area and may wet the couch visibly, possibly leaving a stain.
Rub dryer sheets on the cushions, arms and back of your couch. Dryer sheets contain positively charged particles that help to neutralize negatively charged particles on the fabric.
Turn on a humidifier to add moisture to the air. Dry air increases the likelihood of static electricity.
Cover synthetic upholstery with a cotton slipcover. Natural material fibers, such as cotton, are less likely to conduct static charges.