13. Sleeping in total darkness
No, covering your window to block the sunlight completely does not mean that your room is in total darkness. That is just one part of it. All the gadgets you keep with you, such as your laptop and phone, often blink in the dark. And that is all the distraction your body needs to disrupt the production of melatonin. Hence, either completely shut off the gadgets or keep them in another room when you go to sleep to ensure proper sleep.