How To Cure Seasonal Affective Disorder (SAD)?

Have you ever noticed how you feel more energetic, out of bed and active, more in summers as compared to winters? How a rainy day makes us feel a bit down and sunny days make us feel more cheerful. There is an actual scientific reason for a human body to react this way, and it is directly proportional to the amount of sunlight we are exposed to, and the levels of melatonin, and serotonin in our body.