Light Therapy has apparently helped many people. You can get light therapy lamps- they range in price, and are pretty affordable if you shop around. I found some good ones I have put on my wish list that I saw online.

My doc uses full spectrum bulbs in her reading lamps at home and in her office space. She says that they are much more economical and do help. Full spectrum light bulbs are easier to find. I have seen them in Walgreens and I think it might have also been either Lowe's or Home Depot...

It happens to me, too. Every year. But mostly from November-February for me.