Want to avoid secondhand smoke? Try these five tips: 1. Don't allow smoking in your home. If your guests smoke, ask them to do it outside. If your partner smokes, encourage him or her to quit. 2. Patronize restaurants and other businesses that enforce no-smoking policies. 3. Don't allow smoking in your vehicle. 4. Choose smoke-free care facilities for children and aging loved ones. 5. If you must share space with someone who's smoking, sit as far away from the smoke as possible.