3. Smartwatch
SAD is made significantly worse by the way that most of us wake ourselves in the mornings: with noisy alarm that startles us out of deep sleep into pitch dark. This is one of the reasons that a daylight lamp alarm can make a such difference.
Another solution is to wear a health-tracking smartwatch that can assess your sleep stage and nudge you awake with vibration only at the point where you are in lighter sleep. This will be less of a jarring shock to the system and can help you to start your day feeling better.