Could you tell me what's the best treatment for seasonal affective disorder?

SAD treatment: Seasonal affective disorder is thought to be related to seasonal decreases in sunlight exposure. One effective treatment for sad is light therapy. There are many products on the market. One that i think is well researched is phillips golite available through costco, amazon, and others. A psychologist or counselor who treats depression may help with any other contributing factors.

SAD: Treating seasonal affective disorder: Light therapy can be very effective. Psychotherapy and psychotropic medications can also be beneficial. Consider a tropical vacation when it is cold back home. See: http://www.mayoclinic.org/diseases-conditions/seasonal-affective-disorder/basics/treatment/con-20021047