How can I reduce getting static shocks in winter (from doorknobs, etc)?

Run a humidifier in rooms where you spend the most time to keep indoor humidity between 30% and 50%. Dry winter air allows static charges to build on your body with no path to dissipate, so adding moisture is the single most effective fix.

Before touching a metal doorknob, hold a metal key or coin firmly and press it against the metal surface first. The static charge discharges through the key instead of through your fingertip, eliminating or greatly reducing the painful spark.

Switch to cotton or linen clothing and leather-soled shoes during winter months. Synthetic fabrics like polyester, nylon, and acrylic sit high on the triboelectric series and generate far more static charge through friction, especially against carpet and upholstery.