If you've ever heard of Seasonal Affective Disorder (SAD), you know that lack of adequate light can affect your mood. Opening the drapes and investing in plenty of light fixtures will help you sleep better and stay positive when gray skies threaten. It will also make your small space look larger, cleaner and more welcoming. Avoid adding heavy curtains to your windows by opting for sheers instead. If you can't change the window treatments, keep the blinds or curtains open as much as possible. You can also add task lighting with track light fixtures that plug directly into your wall outlets. This option offers good illumination and pulls the eye upward, making your ceiling look higher and the overall space appear roomier.