No. 3: Eat vegetables

It seems counterintuitive that adding more food to your plate would improve your health. Of course, it also seems counterintuitive that everybody on the planet understands that eating healthy and exercise leads to improved health, yet obesity remains a major problem.

Eating a serving of vegetables at every meal -- be it a pile of peas next to the side of beef or lettuce and tomato on a bacon sandwich -- will help you not overeat. As the Centers for Disease Control and Prevention points out, the water and fiber in vegetables will add volume to your dishes, so you can eat the same amount of food with fewer calories.

In addition to filling your stomach, vegetables contain these things called vitamins. Vitamins support the enzymes that convert proteins, carbohydrates and fats into energy, which means you won't feel sluggish and hungry 14 seconds after lunch.

Eating vegetables for a between-meal snack curbs hunger immediately and gives long-lasting energy. And with all that extra energy, perhaps you'll feel like exercising ...

woman lifting dumbbells, exercise, fitness

No. 2: Exercise

Is there a person alive who doesn't know that exercise promotes good health? But even though it's so simple, not enough of us do it regularly.

According to the Mayo Clinic, exercise improves your mood -- long term and short term (unless you get passed by a one-legged 75-year-old woman during a 5K, that is).

Exercise lessens your risk of chronic disease, such as Type 2 diabetes, heart disease, high blood pressure and other diseases common among the obese. That's because exercise helps you maintain weight and, be honest, improved health is nice, but looking good is more important.

Exercise boosts energy levels -- imagine being twice as productive. Exercise also improves sex -- imagine being twice as productive in the bedroom (even if it's not true, it's certainly worth experimenting with).

After improving your sex life, you can sleep peacefully since exercise also promotes better sleep ...

Woman sleep, sleeping

No. 1: Sleep

Nothing can be simpler than sleeping. You turn off the light. You lay down. You close your eyes. Who would have guessed sleeping could be one of the five simple ways to improve your health?

So why do we all get so little of it?

Harvard Medical School reports that sleep helps with metabolism and maintaining proper weight. It improves memory and mood, increases safety, improves cardiovascular health and decreases the likelihood of getting sick.

Before you get too excited and start chugging Nyquil, sleeping too much can be just as harmful as sleeping too little. Maintaining a consistent pattern of sleep -- including the times at and the conditions in which you sleep -- provides maximum sleep benefits.

So what are you waiting for? Grab some water, a pen and paper, some vegetables, a gym membership and a pillow and start improving your health today.