According to a Mattress Firm–commissioned study that looked at the habits of 2,000 millennials, most spent more than four hours a day stressed out, and 71 percent woke up worrying about something at least three nights a week.

So where is all this sleep-compromising stress originating? Money is the biggest stressor for the average millennial, as well as work-related issues. Which might explain why so many are burnt out by the age of 30. Secondary stress, parents' health issues, and politics also rank near the top.

If worrying cuts into precious sleep time, the stress can shape-shift into other areas of everyday life, making people feel "off", easily irritated and causing them to make simple mistakes at work.

What is a worrisome, sleep-deprived millennial to do? For starters, not getting enough sleep each night is only going to make things worse. Try meditating, stick to a solid workout schedule, eat a healthy diet, drinks lots of water, and go to bed early. With your mental health in good shape, it will get easier to battle those daily stressors and finally get a good night's sleep.