I have never had an issue with depression, but lately I have noticed as I get older my body does not do well when the seasons change.
Exercise helps your body fight the symptoms naturally. It also helps to increase your endorphins and a more positive outlook on life. Again, ask your doctor how much exercise you should be getting a week.
Purchased a Happy Lamp from Amazon. It is portable and not too big. I have been putting it on the kitchen island where my kids eat breakfast.
The busier you are, the less time you have to feel sad. Keeping a schedule and having things to do on the weekend, help keep your mind off the fact that you are tired, and looking for the sunshine.