Add fabric softener to your washing machine just before the final spin cycle. This coats everything in the washer with chemicals that have similar molecular structures, minimizing the electron exchange mechanism that causes static electricity.
Add dryer sheets to the dryer. Like fabric softener, dryer sheets work by coating fabrics with chemicals to reduce static.
Line-dry as many items as possible. Synthetic fabrics such as nylon and polyester are more likely to cause static electricity than cotton. Line-dry fast-drying synthetics and use the dryer for slower-drying natural fabrics.
Avoid over-drying. Static electricity builds up when dry clothes are rubbing against each other as the dryer moves. If you remove clothes when they are still faintly damp and hang them up to finish drying, you won't have problems with static electricity, and it prevents wrinkles.