You can do this by installing full-spectrum lights or florescent lights in your home. If these steps fail to boost your spirit, it may be time for a more rigorous exposure to light. Most recommendations for photo therapy is exposure to very bright lights every morning for half and hour to an hour. And very bright light is at a minimum five or six times as much light as you find at a normal work or home environment. So adding an additional lamp to your desk doesn't produce the kind of effect you're looking for.
Exercise also is considered effective for combating the winter blahs.
And finally, there are prescription drugs available to counter the effects of winter depression. So if you've got the case of the doldrums, cheer up. Add some light to your life and just think, spring isn't too far away. For Arctic Science Journeys, this is Debra Damron.