The sun is key for the brain to understand that it is time to wake up.

When you wake up, try to get the sun as soon as possible, since its light in the morning slows down the production of melatonin, the sleep hormone.

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Have breakfast by the window or go for a walk. 

15 minutes of direct light is enough to start working. 

During that time do not wear sunglasses as the eyes and skin are the main receptors in this process.