If you're searching for the latest high-tech trick to keep you from getting sick this winter, look no farther than soap and water.

A military study revealed that washing one's hands at least five times per day could dramatically reduce illness. In the two-and-a-half-year study conducted by the navy, a hand-washing program reduced by 45% the number of visits that naval recruits made to the infirmary for respiratory illnesses.

RealAge Benefit: Protecting your immune system can make your RealAge as much as 6 years younger

Under Covers

Washing your bed linens in warm water may help you breathe a little easier.

Although previous studies suggested that laundering in very hot water is needed to remove dust mite and cat allergens from bedding, recent research reveals that washing the bedding in warm water (77 degrees Fahrenheit) may be enough to remove most of the allergy-provoking substances. Dust mite and cat allergens are two of the most common household allergens.

RealAge Benefit: Actively patrolling your health can make your RealAge as much as 12 years younger

All Steamed Up

Can a steamy sauna session put a damper on colds? According to one study, it just might.

In a small Austrian study, people who regularly took steams in a sauna experienced significantly fewer colds compared to people who abstained from sauna use. What's more, if you've already got a cold, the steam from a sauna session may help to alleviate some of your symptoms.

RealAge Benefit: Actively patrolling your health can make your RealAge as much as 12 years younger.

A Clean Sweep

If you want to make your house a safe haven during allergy season, be sure to keep up with the housecleaning chores.

Studies show that allergens from pollen or grass can accumulate in household dust, thus contributing to allergy flare-ups. As the weather warms and you begin opening doors and windows, clean your floors and dust other indoor surfaces regularly to help keep your symptoms in check.

RealAge Benefit: Protecting your immune system can make your RealAge as much as 6 years younger

Allergen-Free Auto

Vacuuming your car regularly could help keep your allergies under control.

A recent sampling of automobiles revealed that the amount of pet allergen contained in the seats was plentiful enough to potentially cause symptoms in sensitive people, even when the car's owner did not have pets at home. Researchers speculate that clothing may transport allergens from a variety of sources and deposit them in car seats.