Want to lose weight while you sleep? Here are a few things to try:

Get enough sleep: Not receiving the suggested amount of shut-eye can slow your metabolism.

Hit the gym at night: A good workout can give your body a metabolic boost for more than 12 hours.

Take a cold shower: A 30-second shower with brrrr-inducing water can help activate the body's brown fat, and burn calories in the process.

Turn down your thermostat: Research suggests that sleeping in a room that is 66 degrees or cooler not only makes it easier to fall asleep, it also helps your body release more melatonin, which can protect brain health and improves weight control.