Warm up your winter blues with a little light in your life. A treatment of Seasonal Affective Disorder (SAD), light-box therapy mimics the light from outdoors and "is thought to cause a chemical change in the brain that lifts your mood and eases the symptoms of SAD," according to the Mayo Clinic. How should you use it? Let the light-box light shine indirectly toward your eyes for at least 30 minutes each morning. This will not only help adjust your daily sleep cycles, but it will help combat SAD too.