Medical treatments
Selective serotonin reuptake inhibitors like Prozac, Paxil, and Zoloft have been shown to be effective in treating SAD (seasonal affective disorder).
Many people prefer to take medication because it is less time consuming than sitting in front of a light box for half an hour.
Nutrition and exercise
Studies have shown that complex carbohydrates could suppress serotonin levels (fruits, grains, potatoes, etc.).
Exercise:
A study has shown an improvement in SAD symptoms when a group of people suffering from SAD took a one-hour walk daily out
in the sun. Outdoor light usually provides more light than a light box.